Explanation of the notation on the Pages and the Champion Page.
The Known Mersenne Primes
The Largest Known Primes
The Fermat Prime Divisors ( A new link in 2017)
The Third Edition of The Cunningham Book.
The Joy of Factoring,
a factoring book.
The book cover.
The triplets are Purdue fans.
Some corrections and comments.
Review at Math Reviews.
Review at Math Assn of America.
Review at mersenneforum.
According to AMS' twitter feed, The Joy of Factoring was selected as a 2014 CHOICE magazine Outstanding Academic Title.
Press release for the 2012 discovery of 75- and 79-digit primes by the Elliptic Curve Method.
The "Wanted" lists issued March 1, 2021.
The Champions and First Five Holes as of March 1, 2021.
The Main Tables as of October 13, 2020 (897K bytes). This is the latest version. These tables include all factors through # 6552 on Page 138.
Appendix A as of October 13, 2020 (1411K bytes). (The counts of additional primes in the main tables have not been updated.)
Appendix C as of October 13, 2020 (258K bytes).
The base 2 tables have just been extended to n = 1500. Please send me new factors of these numbers. Extensions to the Cunningham tables.
Page 139 (the latest page).
Page 138 (the previous page).
Who is factoring which number now.
Paper "The Search for Aurifeuillian-Like Factorizations" which appeared in the journal Integers vol. 12A (2012), pp. 1449-1461.
Send e-mail to Sam Wagstaff