Talk:Double Mersenne number

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At approximately what time will all Mersenne exponents below 80,000,000 checked for whether they are prime?? (This is just about how far http://mersenne.org/status.htm goes.) 66.245.19.60 22:02, 10 May 2004 (UTC)

This reference might help: http://www.utm.edu/research/primes/notes/faq/NextMersenne.html. Giftlite 23:56, 10 May 2004 (UTC)

[edit] Just a Conjecture but...

I believe that M_{M_{127}}, or 2170141183460469231731687303715884105727 - 1, is prime. At approximately 5.12176 × 1037 digits, it may be centuries before I am proven correct or incorrect. Also, I believe that this is the fifth, final, and largest Double Mersenne prime. In other words, I believe that M_{M_{n}} is composite for all n > 7, expect for n = 127. PhiEaglesfan712 20:32, 12 July 2007 (UTC)

[edit] Changed definition

PhiEaglesfan712 has just changed the definition of double Mersenne number [1] and Mersenne number [2]. I think both should be changed back. I suggest to keep comments together at Talk:Mersenne prime#Mersenne number. PrimeHunter 23:52, 14 August 2007 (UTC)