Samuel S. Wagstaff Jr.

Samuel S. Wagstaff Jr.
Born	(1945-02-21) February 21, 1945 New Bedford, MA
Nationality	United States
Fields	Mathematics Computer science
Institutions	Purdue University University of Georgia University of Rochester
Alma mater	Cornell University and MIT
Known for	Wagstaff prime

Samuel Standfield Wagstaff Jr. (born 21 February 1945) is an American mathematician and computer scientist, whose research interests are in the areas of cryptography, parallel computation, and analysis of algorithms, especially number theoretic algorithms. He is currently a professor of computer science and mathematics at Purdue University^[1] who coordinates the Cunningham project, a project to factor numbers of the form bⁿ ± 1, since 1983. He has authored/coauthored over 50 research papers and three books.^[2] He has an Erdős number of 1.^[3]

Wagstaff received his Bachelor of Science in 1966 from Massachusetts Institute of Technology. His doctoral dissertation was titled, On Infinite Matroids, Ph.D. in 1970 from Cornell University.^[1]^[4]

Wagstaff was one of the founding faculty of Center for Education and Research in Information Assurance and Security (CERIAS) at Purdue, and its precursor, the Computer Operations, Audit, and Security Technology (COAST) Laboratory.

Selected publications

with John Brillhart, D. H. Lehmer, John L. Selfridge, Bryant Tuckerman: Factorization of bⁿ ± 1, b = 2,3,5,6,7,10,11,12 up to high powers, American Mathematical Society, 1983, 3rd edition 2002 as electronic book, Online text
Cryptanalysis of number theoretic ciphers, CRC Press 2002
with Carlos J. Moreno: Sums of Squares of Integers, CRC Press 2005
The Joy of Factoring, Student Mathematical Library (American Mathematical Society) 2013
Wagstaff The Cunningham Project, Fields Institute, pdf file

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