RSA numbers

In mathematics, the RSA numbers are a set of large semiprimes (numbers with exactly two prime factors) that are part of the RSA Factoring Challenge. The challenge was to find the prime factors but it was declared inactive in 2007.[1] It was created by RSA Laboratories in March 1991 to encourage research into computational number theory and the practical difficulty of factoring large integers.

RSA Laboratories published a number of semiprimes with 100 to 617 decimal digits. Cash prizes of varying size were offered for factorization of some of them. The smallest RSA number was factored in a few days. Most of the numbers have still not been factored and many of them are expected to remain unfactored for many years to come. As of May 2016, 19 of the 54 listed numbers have been factored: the 18 smallest from RSA-100 to RSA-220, plus RSA-768.

The RSA challenge officially ended in 2007 but people are still attempting to find the factorizations. According to RSA Laboratories, "Now that the industry has a considerably more advanced understanding of the cryptanalytic strength of common symmetric-key and public-key algorithms, these challenges are no longer active."[2] Some of the smaller prizes had been awarded at the time. The remaining prizes were retracted.

The first RSA numbers generated, from RSA-100 to RSA-500, were labeled according to their number of decimal digits. Later, beginning with RSA-576, binary digits are counted instead. An exception to this is RSA-617, which was created before the change in the numbering scheme. The numbers are listed in increasing order below.

Contents
  See also     Notes     References     External links

RSA-100

RSA-100 has 100 decimal digits (330 bits). Its factorization was announced on April 1, 1991 by Arjen K. Lenstra.[3][4] Reportedly, the factorization took a few days using the multiple-polynomial quadratic sieve algorithm on a MasPar parallel computer.[5]

The value and factorization of RSA-100 are as follows:

RSA-100 = 15226050279225333605356183781326374297180681149613
          80688657908494580122963258952897654000350692006139
RSA-100 = 37975227936943673922808872755445627854565536638199
        × 40094690950920881030683735292761468389214899724061

It takes four hours to repeat this factorization using the program Msieve on a 2200 MHz Athlon 64 processor.

The number can be factorised in 72 minutes on overclocked to 3.5 GHz Intel Core2 Quad q9300, using GGNFS and Msieve binaries running by distributed version of the factmsieve Perl script.[6]

RSA-110

RSA-110 has 110 decimal digits (364 bits), and was factored in April 1992 by Arjen K. Lenstra and Mark S. Manasse in approximately one month.[5] The number can be factorised in less than 4 hours on overclocked to 3.5 GHz Intel Core2 Quad q9300, using GGNFS and Msieve binaries running by distributed version of the factmsieve Perl script.[6]

The value and factorization are as follows:

RSA-110 = 3579423417972586877499180783256845540300377802422822619
          3532908190484670252364677411513516111204504060317568667
RSA-110 = 6122421090493547576937037317561418841225758554253106999
        × 5846418214406154678836553182979162384198610505601062333

RSA-120

RSA-120 has 120 decimal digits (397 bits), and was factored in June 1993 by Thomas Denny, Bruce Dodson, Arjen K. Lenstra, and Mark S. Manasse.[7] The computation took under three months of actual computer time.

The value and factorization are as follows:

RSA-120 = 227010481295437363334259960947493668895875336466084780038173
          258247009162675779735389791151574049166747880487470296548479
RSA-120 = 327414555693498015751146303749141488063642403240171463406883
        × 693342667110830181197325401899700641361965863127336680673013

RSA-129

RSA-129, having 129 decimal digits (426 bits), was not part of the 1991 RSA Factoring Challenge, but rather related to Martin Gardner's column in the August 1977 issue of Scientific American.[8]

RSA-129 was factored in April 1994 by a team led by Derek Atkins, Michael Graff, Arjen K. Lenstra and Paul Leyland, using approximately 1600 computers[9] from around 600 volunteers connected over the Internet.[10] A US$100 token prize was awarded by RSA Security for the factorization, which was donated to the Free Software Foundation.

The value and factorization are as follows:

RSA-129 = 11438162575788886766923577997614661201021829672124236256256184293
          5706935245733897830597123563958705058989075147599290026879543541
RSA-129 = 3490529510847650949147849619903898133417764638493387843990820577
        × 32769132993266709549961988190834461413177642967992942539798288533

The factorization was found using the Multiple Polynomial Quadratic Sieve algorithm.

The factoring challenge included a message encrypted with RSA-129. When decrypted using the factorization the message was revealed to be "The Magic Words are Squeamish Ossifrage".

RSA-130

RSA-130 has 130 decimal digits (430 bits), and was factored on April 10, 1996 by a team led by Arjen K. Lenstra and composed of Jim Cowie, Marije Elkenbracht-Huizing, Wojtek Furmanski, Peter L. Montgomery, Damian Weber and Joerg Zayer.[11]

The value and factorization are as follows:

RSA-130 = 18070820886874048059516561644059055662781025167694013491701270214
          50056662540244048387341127590812303371781887966563182013214880557
RSA-130 = 39685999459597454290161126162883786067576449112810064832555157243
        × 45534498646735972188403686897274408864356301263205069600999044599

The factorization was found using the Number Field Sieve algorithm and the polynomial

   5748302248738405200 x5 +  9882261917482286102 x4
- 13392499389128176685 x3 + 16875252458877684989 x2
+  3759900174855208738 x1 - 46769930553931905995

which has a root of 12574411168418005980468 modulo RSA-130.

RSA-140

RSA-140 has 140 decimal digits (463 bits), and was factored on February 2, 1999 by a team led by Herman te Riele and composed of Stefania Cavallar, Bruce Dodson, Arjen K. Lenstra, Paul Leyland, Walter Lioen, Peter L. Montgomery, Brian Murphy and Paul Zimmermann.[12][13]

The value and factorization are as follows:

RSA-140 = 2129024631825875754749788201627151749780670396327721627823338321538194
          9984056495911366573853021918316783107387995317230889569230873441936471
RSA-140 = 3398717423028438554530123627613875835633986495969597423490929302771479
        × 6264200187401285096151654948264442219302037178623509019111660653946049

The factorization was found using the Number Field Sieve algorithm and an estimated 2000 MIPS-years of computing time.

RSA-150

RSA-150 has 150 decimal digits (496 bits), and was withdrawn from the challenge by RSA Security. RSA-150 was eventually factored into two 75-digit primes by Aoki et al. in 2004 using the general number field sieve (GNFS), years after bigger RSA numbers that were still part of the challenge had been solved.

The value and factorization are as follows:

RSA-150 = 155089812478348440509606754370011861770654545830995430655466945774312632703
          463465954363335027577729025391453996787414027003501631772186840890795964683
RSA-150 = 348009867102283695483970451047593424831012817350385456889559637548278410717
        × 445647744903640741533241125787086176005442536297766153493419724532460296199

RSA-155

RSA-155 has 155 decimal digits (512 bits), and was factored on August 22, 1999 in a span of 6 months, by a team led by Herman te Riele and composed of Stefania Cavallar, Bruce Dodson, Arjen K. Lenstra, Walter Lioen, Peter L. Montgomery, Brian Murphy, Karen Aardal, Jeff Gilchrist, Gerard Guillerm, Paul Leyland, Joel Marchand, François Morain, Alec Muffett, Craig Putnam, Chris Putnam and Paul Zimmermann.[14][15]

The value and factorization are as follows:

RSA-155 = 109417386415705274218097073220403576120037329454492059909138421314763499842889
          34784717997257891267332497625752899781833797076537244027146743531593354333897
RSA-155 = 102639592829741105772054196573991675900716567808038066803341933521790711307779
        × 106603488380168454820927220360012878679207958575989291522270608237193062808643

The factorization was found using the general number field sieve algorithm and an estimated 8000 MIPS-years of computing time.

RSA-160

RSA-160 has 160 decimal digits (530 bits), and was factored on April 1, 2003 by a team from the University of Bonn and the German Federal Office for Information Security (BSI). The team contained J. Franke, F. Bahr, T. Kleinjung, M. Lochter, and M. Böhm.[16][17]

The value and factorization are as follows:

RSA-160 = 21527411027188897018960152013128254292577735888456759801704976767781331452188591
          35673011059773491059602497907111585214302079314665202840140619946994927570407753
RSA-160 = 45427892858481394071686190649738831656137145778469793250959984709250004157335359
        × 47388090603832016196633832303788951973268922921040957944741354648812028493909367

The factorization was found using the general number field sieve algorithm.

RSA-170

RSA-170 has 170 decimal digits (563 bits), and was factored on December 29, 2009 by D. Bonenberger and M. Krone from Fachhochschule Braunschweig/Wolfenbüttel.[18] The factorization of RSA-170 was also independently completed by S. A. Danilov and I. A. Popovyan two days later.[19]

The value and factorization are as follows:

RSA-170 = 2606262368413984492152987926667443219708592538048640641616478519185999962854206936145
          0283931914514618683512198164805919882053057222974116478065095809832377336510711545759
RSA-170 = 3586420730428501486799804587268520423291459681059978161140231860633948450858040593963
        × 7267029064107019078863797763923946264136137803856996670313708936002281582249587494493

The factorization was found using the general number field sieve algorithm.

RSA-576

RSA-576 has 174 decimal digits (576 bits), and was factored on December 3, 2003 by J. Franke and T. Kleinjung from the University of Bonn.[20][21][22] A cash prize of US$10,000 was offered by RSA Security for a successful factorization.

The value and factorization are as follows:

RSA-576 = 188198812920607963838697239461650439807163563379417382700763356422988859715234665485319
          060606504743045317388011303396716199692321205734031879550656996221305168759307650257059
RSA-576 = 398075086424064937397125500550386491199064362342526708406385189575946388957261768583317
        × 472772146107435302536223071973048224632914695302097116459852171130520711256363590397527

The factorization was found using the general number field sieve algorithm.

RSA-180

RSA-180 has 180 decimal digits (596 bits), and was factored on May 8, 2010 by S. A. Danilov and I. A. Popovyan from Moscow State University, Russia.[23]

RSA-180 = 191147927718986609689229466631454649812986246276667354864188503638807260703436799058776201
          365135161278134258296128109200046702912984568752800330221777752773957404540495707851421041
RSA-180 = 400780082329750877952581339104100572526829317815807176564882178998497572771950624613470377
        × 476939688738611836995535477357070857939902076027788232031989775824606225595773435668861833

The factorization was found using the general number field sieve algorithm implementation running on 3 Intel Core i7 PCs.

RSA-190

RSA-190 has 190 decimal digits (629 bits), and was factored on November 8, 2010 by I. A. Popovyan from Moscow State University, Russia and A. Timofeev from CWI, Netherlands.[24]

RSA-190 = 19075564050606964910614504326460288610811797595331844606479756223189150255871841757540549761551
          21593293492260464152630093238509246603207417124726121580858185985938946945490481721756401423481
RSA-190 = 31711952576901527094851712897404759298051473160294503277847619278327936427981256542415724309619
        × 60152600204445616415876416855266761832435433594718110725997638280836157040460481625355619404899

RSA-640

RSA-640 has 640 bits (193 decimal digits). A cash prize of US$20,000 was offered by RSA Security for a successful factorization. On November 2, 2005, F. Bahr, M. Boehm, J. Franke and T. Kleinjung of the German Federal Office for Information Security announced that they had factorized the number using GNFS as follows:[25][26][27]

RSA-640 = 31074182404900437213507500358885679300373460228427275457
          20161948823206440518081504556346829671723286782437916272
          83803341547107310850191954852900733772482278352574238645
          4014691736602477652346609
RSA-640 = 16347336458092538484431338838650908598417836700330923121
          81110852389333100104508151212118167511579
        × 19008712816648221131268515739354139754718967899685154936
          66638539088027103802104498957191261465571

The computation took 5 months on 80 2.2 GHz AMD Opteron CPUs.

The slightly larger RSA-200 was factored in May 2005 by the same team.

RSA-200

RSA-200 has 200 decimal digits (663 bits), and factors into the two 100-digit primes given below.

On May 9, 2005, F. Bahr, M. Boehm, J. Franke, and T. Kleinjung announced[28][29] that they had factorized the number using GNFS as follows:

RSA-200 = 2799783391122132787082946763872260162107044678695542853756000992932612840010
          7609345671052955360856061822351910951365788637105954482006576775098580557613
          579098734950144178863178946295187237869221823983
RSA-200 = 3532461934402770121272604978198464368671197400197625023649303468776121253679
          423200058547956528088349
        × 7925869954478333033347085841480059687737975857364219960734330341455767872818
          152135381409304740185467

The CPU time spent on finding these factors by a collection of parallel computers amounted – very approximately – to the equivalent of 75 years work for a single 2.2 GHz Opteron-based computer.[28] Note that while this approximation serves to suggest the scale of the effort, it leaves out many complicating factors; the announcement states it more precisely.

RSA-210

RSA-210 has 210 decimal digits (696 bits) and was factored in September 2013 by Ryan Propper:[30]

RSA-210 = 2452466449002782119765176635730880184670267876783327597434144517150616008300
          3858721695220839933207154910362682719167986407977672324300560059203563124656
          1218465817904100131859299619933817012149335034875870551067
RSA-210 = 4359585683259407917999519653872144063854709102652201963187054821445240853452
          75999740244625255428455944579 
        × 5625457617268841037562770073044474817438769440075105451049468510945483965774
          79473472146228550799322939273

RSA-704

RSA-704 has 704 bits (212 decimal digits), and was factored by Shi Bai, Emmanuel Thomé and Paul Zimmermann.[31] The factorization was announced July 2, 2012.[32] A cash prize of US$30,000 was previously offered for a successful factorization.

RSA-704 = 74037563479561712828046796097429573142593188889231289084936232638972765034
          02826627689199641962511784399589433050212758537011896809828673317327310893
          0900552505116877063299072396380786710086096962537934650563796359
RSA-704 = 90912135295978188784406583026004374858926083103283587204285121689604115286
          40933367824950788367956756806141
        × 81438592591100452657278091262844293358778990021676278832009141724293243601
          33004116702003240828777970252499

RSA-220

RSA-220 has 220 decimal digits (729 bits), and was factored by S. Bai, P. Gaudry, A. Kruppa, E. Thomé and P. Zimmermann. The factorization was announced on May 13, 2016.[33]

RSA-220 = 2260138526203405784941654048610197513508038915719776718321197768109445641817
          9666766085931213065825772506315628866769704480700018111497118630021124879281
          99487482066070131066586646083327982803560379205391980139946496955261
RSA-220 = 6863656412267566274382371499288437800130842239979164844621244993321541061441
          4642667938213644208420192054999687
        × 3292907439486349812049301549212935291916455196536233952462686051169290349309
          4652463337824866390738191765712603

RSA-230

RSA-230 has 230 decimal digits (762 bits), and has not been factored so far.

RSA-230 = 1796949159794106673291612844957324615636756180801260007088891883553172646
          0341490933493372247868650755230855864199929221814436684722874052065257937
          4956943483892631711525225256544109808191706117425097024407180103648316382
          88518852689

RSA-232

RSA-232 has 232 decimal digits (768 bits), and has not been factored so far.

RSA-232 = 1009881397871923546909564894309468582818233821955573955141120516205831021338
          5285453743661097571543636649133800849170651699217015247332943892702802343809
          6090980497644054071120196541074755382494867277137407501157718230539834060616
          2079

RSA-768

RSA-768 has 232 decimal digits (768 bits), and was factored on December 12, 2009 over the span of 2 years, by Thorsten Kleinjung, Kazumaro Aoki, Jens Franke, Arjen K. Lenstra, Emmanuel Thomé, Pierrick Gaudry, Alexander Kruppa, Peter Montgomery, Joppe W. Bos, Dag Arne Osvik, Herman te Riele, Andrey Timofeev, and Paul Zimmermann.[34]

RSA-768 = 12301866845301177551304949583849627207728535695953347921973224521517264005
          07263657518745202199786469389956474942774063845925192557326303453731548268
          50791702612214291346167042921431160222124047927473779408066535141959745985
          6902143413
RSA-768 = 33478071698956898786044169848212690817704794983713768568912431388982883793
          878002287614711652531743087737814467999489
        × 36746043666799590428244633799627952632279158164343087642676032283815739666
          511279233373417143396810270092798736308917

The CPU time spent on finding these factors by a collection of parallel computers amounted approximately to the equivalent of almost 2000 years of computing on a single-core 2.2 GHz AMD Opteron-based computer.[34]

RSA-240

RSA-240 has 240 decimal digits (795 bits), and has not been factored so far.

RSA-240 = 1246203667817187840658350446081065904348203746516788057548187888832896668011
          8821085503603957027250874750986476843845862105486553797025393057189121768431
          8286362846948405301614416430468066875699415246993185704183030512549594371372
          159029236099

RSA-250

RSA-250 has 250 decimal digits (829 bits), and has not been factored so far.

RSA-250 = 2140324650240744961264423072839333563008614715144755017797754920881418023447
          1401366433455190958046796109928518724709145876873962619215573630474547705208
          0511905649310668769159001975940569345745223058932597669747168173806936489469
          9871578494975937497937

RSA-260

RSA-260 has 260 decimal digits (862 bits), and has not been factored so far.

RSA-260 = 2211282552952966643528108525502623092761208950247001539441374831912882294140
          2001986512729726569746599085900330031400051170742204560859276357953757185954
          2988389587092292384910067030341246205457845664136645406842143612930176940208
          46391065875914794251435144458199

RSA-270

RSA-270 has 270 decimal digits (895 bits), and has not been factored so far.

RSA-270 = 2331085303444075445276376569106805241456198124803054490429486119684959182451
          3578286788836931857711641821391926857265831491306067262691135402760979316634
          1626693946596196427744273886601876896313468704059066746903123910748277606548
          649151920812699309766587514735456594993207

RSA-896

RSA-896 has 896 bits (270 decimal digits), and has not been factored so far. A cash prize of $75,000 was previously offered for a successful factorization.

RSA-896 = 41202343698665954385553136533257594817981169984432798284545562643387644556
          52484261980988704231618418792614202471888694925609317763750334211309823974
          85150944909106910269861031862704114880866970564902903653658867433731720813
          104105190864254793282601391257624033946373269391

RSA-280

RSA-280 has 280 decimal digits (928 bits), and has not been factored so far.

RSA-280 = 1790707753365795418841729699379193276395981524363782327873718589639655966058
          5783742549640396449103593468573113599487089842785784500698716853446786525536
          5503525160280656363736307175332772875499505341538927978510751699922197178159
          7724733184279534477239566789173532366357270583106789

RSA-290

RSA-290 has 290 decimal digits (962 bits), and has not been factored so far.

RSA-290 = 3050235186294003157769199519894966400298217959748768348671526618673316087694
          3419156362946151249328917515864630224371171221716993844781534383325603218163
          2549201100649908073932858897185243836002511996505765970769029474322210394327
          60575157628357292075495937664206199565578681309135044121854119

RSA-300

RSA-300 has 300 decimal digits (995 bits), and has not been factored so far.

RSA-300 = 2769315567803442139028689061647233092237608363983953254005036722809375824714
          9473946190060218756255124317186573105075074546238828817121274630072161346956
          4396741836389979086904304472476001839015983033451909174663464663867829125664
          459895575157178816900228792711267471958357574416714366499722090015674047

RSA-309

RSA-309 has 309 decimal digits (1,024 bits), and has not been factored so far.

RSA-309 = 1332943998825757583801437794588036586217112243226684602854588261917276276670
          5425540467426933349195015527349334314071822840746357352800368666521274057591
          1870128339157499072351179666739658503429931021985160714113146720277365006623
          6927218079163559142755190653347914002967258537889160429597714204365647842739
          10949

RSA-1024

RSA-1024 has 1,024 bits (309 decimal digits), and has not been factored so far. US$100,000 was previously offered for factorization.

RSA-1024 = 13506641086599522334960321627880596993888147560566702752448514385152651060
           48595338339402871505719094417982072821644715513736804197039641917430464965
           89274256239341020864383202110372958725762358509643110564073501508187510676
           59462920556368552947521350085287941637732853390610975054433499981115005697
           7236890927563

RSA-310

RSA-310 has 310 decimal digits (1,028 bits), and has not been factored so far.

RSA-310 = 1848210397825850670380148517702559371400899745254512521925707445580334710601
          4125276757082979328578439013881047668984294331264191394626965245834649837246
          5163148188847336415136873623631778358751846501708714541673402642461569061162
          0116380982484120857688483676576094865930188367141388795454378671343386258291
          687641

RSA-320

RSA-320 has 320 decimal digits (1,061 bits), and has not been factored so far.

RSA-320 = 2136810696410071796012087414500377295863767938372793352315068620363196552357
          8837094085435000951700943373838321997220564166302488321590128061531285010636
          8571638978998117122840139210685346167726847173232244364004850978371121744321
          8270343654835754061017503137136489303437996367224915212044704472299799616089
          2591129924218437

RSA-330

RSA-330 has 330 decimal digits (1,094 bits), and has not been factored so far.

RSA-330 = 1218708633106058693138173980143325249157710686226055220408666600017481383238
          1352456802425903555880722805261111079089882303717632638856140900933377863089
          0634828167900405006112727432172179976427017137792606951424995281839383708354
          6364684839261149319768449396541020909665209789862312609604983709923779304217
          01862444655244698696759267

RSA-340

RSA-340 has 340 decimal digits (1,128 bits), and has not been factored so far.

RSA-340 = 2690987062294695111996484658008361875931308730357496490239672429933215694995
          2758588771223263308836649715112756731997946779608413232406934433532048898585
          9176676580752231563884394807622076177586625973975236127522811136600110415063
          0004691128152106812042872285697735145105026966830649540003659922618399694276
          990464815739966698956947129133275233

RSA-350

RSA-350 has 350 decimal digits (1,161 bits), and has not been factored so far.

RSA-350 = 2650719995173539473449812097373681101529786464211583162467454548229344585504
          3495841191504413349124560193160478146528433707807716865391982823061751419151
          6068496555750496764686447379170711424873128631468168019548127029171231892127
          2886825928263239383444398948209649800021987837742009498347263667908976501360
          3382322972552204068806061829535529820731640151

RSA-360

RSA-360 has 360 decimal digits (1,194 bits), and has not been factored so far.

RSA-360 = 2186820202343172631466406372285792654649158564828384065217121866374227745448
          7764963889680817334211643637752157994969516984539482486678141304751672197524
          0052350576247238785129338002757406892629970748212734663781952170745916609168
          9358372359962787832802257421757011302526265184263565623426823456522539874717
          61591019113926725623095606566457918240614767013806590649

RSA-370

RSA-370 has 370 decimal digits (1,227 bits), and has not been factored so far.

RSA-370 = 1888287707234383972842703127997127272470910519387718062380985523004987076701
          7212819937261952549039800018961122586712624661442288502745681454363170484690
          7379449525034797494321694352146271320296579623726631094822493455672541491544
          2700993152879235272779266578292207161032746297546080025793864030543617862620
          878802244305286292772467355603044265985905970622730682658082529621

RSA-380

RSA-380 has 380 decimal digits (1,261 bits), and has not been factored so far.

RSA-380 = 3013500443120211600356586024101276992492167997795839203528363236610578565791
          8270750937407901898070219843622821090980641477056850056514799336625349678549
          2187941807116344787358312651772858878058620717489800725333606564197363165358
          2237779263423501952646847579678711825720733732734169866406145425286581665755
          6977260763553328252421574633011335112031733393397168350585519524478541747311

RSA-390

RSA-390 has 390 decimal digits (1,294 bits), and has not been factored so far.

RSA-390 = 2680401941182388454501037079346656065366941749082852678729822424397709178250
          4623002472848967604282562331676313645413672467684996118812899734451228212989
          1630084759485063423604911639099585186833094019957687550377834977803400653628
          6955344904367437281870253414058414063152368812498486005056223028285341898040
          0795447435865033046248751475297412398697088084321037176392288312785544402209
          1083492089

RSA-400

RSA-400 has 400 decimal digits (1,327 bits), and has not been factored so far.

RSA-400 = 2014096878945207511726700485783442547915321782072704356103039129009966793396
          1419850865094551022604032086955587930913903404388675137661234189428453016032
          6191193056768564862615321256630010268346471747836597131398943140685464051631
          7519403149294308737302321684840956395183222117468443578509847947119995373645
          3607109795994713287610750434646825511120586422993705980787028106033008907158
          74500584758146849481

RSA-410

RSA-410 has 410 decimal digits (1,360 bits), and has not been factored so far.

RSA-410 = 1965360147993876141423945274178745707926269294439880746827971120992517421770
          1079138139324539033381077755540830342989643633394137538983355218902490897764
          4412968474332754608531823550599154905901691559098706892516477785203855688127
          0635069372091564594333528156501293924133186705141485137856845741766150159437
          6063244163040088180887087028771717321932252992567756075264441680858665410918
          431223215368025334985424358839

RSA-420

RSA-420 has 420 decimal digits (1,393 bits), and has not been factored so far.

RSA-420 = 2091366302476510731652556423163330737009653626605245054798522959941292730258
          1898373570076188752609749648953525484925466394800509169219344906273145413634
          2427186266197097846022969248579454916155633686388106962365337549155747268356
          4666583846809964354191550136023170105917441056517493690125545320242581503730
          3405952887826925813912683942756431114820292313193705352716165790132673270514
          3817744164107601735413785886836578207979

RSA-430

RSA-430 has 430 decimal digits (1,427 bits), and has not been factored so far.

RSA-430 = 3534635645620271361541209209607897224734887106182307093292005188843884213420
          6950355315163258889704268733101305820000124678051064321160104990089741386777
          2424190744453885127173046498565488221441242210687945185565975582458031351338
          2070785777831859308900851761495284515874808406228585310317964648830289141496
          3289966226854692560410075067278840383808716608668377947047236323168904650235
          70092246473915442026549955865931709542468648109541

RSA-440

RSA-440 has 440 decimal digits (1,460 bits), and has not been factored so far.

RSA-440 = 260142821195560259007078848737132055053981080459523528942350858966
          339127083743102526748005924267463190079788900653375731605419428681
          140656438533272294845029942332226171123926606357523257736893667452
          341192247905168387893684524818030772949730495971084733797380514567
          326311991648352970360740543275296663078122345977663907504414453144
          081718020709040727392759304102993590060596193055907019396277252961
          16299946059898442103959412221518213407370491

RSA-450

RSA-450 has 450 decimal digits (1,493 bits), and has not been factored so far.

RSA-450 = 1984634237142836623497230721861131427789462869258862089878538009871598692569
          0078791591684242367262529704652673686711493985446003494265587358393155378115
          8032447061155145160770580926824366573211993981662614635734812647448360573856
          3132247491715526997278115514905618953253443957435881503593414842367096046182
          7643434794849824315251510662855699269624207451365738384255497823390996283918
          3287667419172988072221996532403300258906083211160744508191024837057033

RSA-460

RSA-460 has 460 decimal digits (1,526 bits), and has not been factored so far.

RSA-460 = 1786856020404004433262103789212844585886400086993882955081051578507634807524
          1464078819812169681394445771476334608488687746254318292828603396149562623036
          3564554675355258128655971003201417831521222464468666642766044146641933788836
          8932452217321354860484353296131403821175862890998598653858373835628654351880
          4806362231643082386848731052350115776715521149453708868428108303016983133390
          0416365515466857004900847501644808076825638918266848964153626486460448430073
          4909

RSA-1536

RSA-1536 has 463 decimal digits (1,536 bits), and has not been factored so far. $150,000 was previously offered for successful factorization.

RSA-1536 = 18476997032117414743068356202001644030185493386634101714717857749106516967
           11161249859337684305435744585616061544571794052229717732524660960646946071
           24962372044202226975675668737842756238950876467844093328515749657884341508
           84755282981867264513398633649319080846719904318743812833635027954702826532
           97802934916155811881049844908319545009848393775227257052578591944993870073
           69575568843693381277961308923039256969525326162082367649031603655137144791
           3932347169566988069

RSA-470

RSA-470 has 470 decimal digits (1,559 bits), and has not been factored so far.

RSA-470 = 1705147378468118520908159923888702802518325585214915968358891836980967539803
          6897711442383602526314519192366612270595815510311970886116763177669964411814
          0957486602388713064698304619191359016382379244440741228665455229545368837485
          5874455212895044521809620818878887632439504936237680657994105330538621759598
          4047709603954312447692725276887594590658792939924609261264788572032212334726
          8553025718835659126454325220771380103576695555550710440908570895393205649635
          76770285413369

RSA-480

RSA-480 has 480 decimal digits (1,593 bits), and has not been factored so far.

RSA-480 = 3026570752950908697397302503155918035891122835769398583955296326343059761445
          7144169659817040125185215913853345598217234371231338324773210726853524776378
          4105186549246199888070331088462855743520880671299302895546822695492968577380
          7067958428022008294111984222973260208233693152589211629901686973933487362360
          8129660418514569063995282978176790149760521395548532814196534676974259747930
          6858645849268328985687423881853632604706175564461719396117318298679820785491
          875674946700413680932103

RSA-490

RSA-490 has 490 decimal digits (1,626 bits), and has not been factored so far.

RSA-490 = 1860239127076846517198369354026076875269515930592839150201028353837031025971
          3738522164743327949206433999068225531855072554606782138800841162866037393324
          6578171804201717222449954030315293547871401362961501065002486552688663415745
          9758925793594165651020789220067311416926076949777767604906107061937873540601
          5942747316176193775374190713071154900658503269465516496828568654377183190586
          9537640698044932638893492457914750855858980849190488385315076922453755527481
          1376719096144119390052199027715691

RSA-500

RSA-500 has 500 decimal digits (1,659 bits) and has not been factored so far.

RSA-500 = 1897194133748626656330534743317202527237183591953428303184581123062450458870
          7687605943212347625766427494554764419515427586743205659317254669946604982419
          7301601038125215285400688031516401611623963128370629793265939405081077581694
          4786041721411024641038040278701109808664214800025560454687625137745393418221
          5494821277335671735153472656328448001134940926442438440198910908603252678814
          7850601132077287172819942445113232019492229554237898606631074891074722425617
          39680319169243814676235712934292299974411361

RSA-617

RSA-617 has 617 decimal digits (2,048 bits) and has not been factored so far.

RSA-617 = 2270180129378501419358040512020458674106123596276658390709402187921517148311
          9139894870133091111044901683400949483846818299518041763507948922590774925466
          0881718792594659210265970467004498198990968620394600177430944738110569912941
          2854289188085536270740767072259373777266697344097736124333639730805176309150
          6836310795312607239520365290032105848839507981452307299417185715796297454995
          0235053160409198591937180233074148804462179228008317660409386563445710347785
          5345712108053073639453592393265186603051504106096643731332367283153932350006
          7937107541955437362433248361242525945868802353916766181532375855504886901432
          221349733

RSA-2048

RSA-2048 has 617 decimal digits (2,048 bits). It is the largest of the RSA numbers and carried the largest cash prize for its factorization, US$200,000. The largest factored RSA number is 232 decimal digits long (768 bits), and the RSA-2048 may not be factorizable for many years to come, unless considerable advances are made in integer factorization or computational power in the near future.

RSA-2048 = 2519590847565789349402718324004839857142928212620403202777713783604366202070
           7595556264018525880784406918290641249515082189298559149176184502808489120072
           8449926873928072877767359714183472702618963750149718246911650776133798590957
           0009733045974880842840179742910064245869181719511874612151517265463228221686
           9987549182422433637259085141865462043576798423387184774447920739934236584823
           8242811981638150106748104516603773060562016196762561338441436038339044149526
           3443219011465754445417842402092461651572335077870774981712577246796292638635
           6373289912154831438167899885040445364023527381951378636564391212010397122822
           120720357

See also

Notes

  1. ↑ RSA Laboratories, The RSA Factoring Challenge. Retrieved on 2008-03-10.
  2. ↑ RSA Laboratories, The RSA Factoring Challenge FAQ. Retrieved on 2008-03-10.
  3. ↑ "RSA-100 Factored". Cryptography Watch Archive for April, 1991. 1991-04-01. Retrieved 2008-08-05.
  4. ↑ "RSA Honor Roll". 1999-03-05. Retrieved 2008-08-05.
  5. 1 2 Brandon Dixon and Arjen K. Lenstra. "Factoring Integers Using SIMD Sieves". doi:10.1007/3-540-48285-7.
  6. 1 2 "Distributed version of the FactMsieve Perl script". 2012-03-27. Retrieved 2015-06-08.
  7. ↑ T. Denny, B. Dodson, A. K. Lenstra, M. S. Manasse (1994), "On The Factorization Of RSA-120" .
  8. ↑ "RSA Honor Roll". 1999-03-05. Retrieved 2008-08-06.
  9. ↑ "The Magic Words Are Squeamish Ossifrage". Retrieved 2009-11-24.
  10. ↑ Mark Janeba (1994), Factoring Challenge Conquered. Retrieved on 2008-03-10.
  11. ↑ Arjen K. Lenstra (1996-04-12), Factorization of RSA-130. Retrieved on 2008-03-10.
  12. ↑ Herman te Riele (1999-02-04), Factorization of RSA-140. Retrieved on 2008-03-10.
  13. ↑ RSA Laboratories, RSA-140 is factored!. Retrieved on 2008-03-10.
  14. ↑ Herman te Riele (1999-08-26), New factorization record (announcement of factorization of RSA-155). Retrieved on 2008-03-10.
  15. ↑ RSA Laboratories, RSA-155 is factored!. Retrieved on 2008-03-10.
  16. ↑ Jens Franke (2003-04-01), RSA-160 (announcement of factorization). Retrieved on 2008-03-10.
  17. ↑ RSA Laboratories, RSA-160 is factored!. Retrieved on 2008-03-10.
  18. ↑ D. Bonenberger and M. Krone, RSA-170 Retrieved on 2010-03-08.
  19. ↑ http://eprint.iacr.org/2010/270.pdf
  20. ↑ Jens Franke (2003-12-03), RSA576 (repost of announcement of the factorization). Retrieved on 2008-03-10.
  21. ↑ Eric W. Weisstein (2005-12-05), RSA-576 Factored at MathWorld. Retrieved on 2008-03-10.
  22. ↑ RSA Laboratories, RSA-576 is factored!. Retrieved on 2008-03-10.
  23. ↑ "S.A. Danilov and I.A. Popovyan Factorization of RSA-180".. Retrieved on 2010-05-12.
  24. ↑ I. Popovyan, A. Timofeev (2010-11-08). "RSA-190 factored". mersenneforum.org. Retrieved 2010-11-10.
  25. ↑ RSA Laboratories, RSA-640 is factored!. Retrieved on 2008-03-10.
  26. ↑ Jens Franke (2005-11-04), We have factored RSA640 by GNFS. Retrieved on 2008-03-10.
  27. ↑ Eric W. Weisstein (2005-11-08), RSA-640 Factored at MathWorld. Retrieved on 2008-03-10.
  28. 1 2 Thorsten Kleinjung (2005-05-09), We have factored RSA200 by GNFS. Retrieved on 2008-03-10.
  29. ↑ RSA Laboratories, RSA-200 is factored!. Retrieved on 2017-01-25.
  30. ↑ RSA-210 factored, mersenneforum.org
  31. ↑ Factorisation of RSA-704 with CADO-NFS.
  32. ↑ Bai, Shi (2012-07-02). "Factorization of RSA704". NMBRTHRY (Mailing list). Retrieved 2012-07-03.
  33. ↑ Zimmermann, Paul (May 13, 2016). "Factorisation of RSA-220 with CADO-NFS". Cado-nfs-discuss (Mailing list). Retrieved 2016-05-13.
  34. 1 2 Cryptology ePrint Archive: Report 2010/006

References

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