Factoring Links

• The Cunningham Project.
• Richard Brent's Factor Tables.
• NFSNET.
• A similar NFSNET Project website.
• RSA's Factoring Challenge.
• The ECMNET Project.
• Paul Zimmermann's Factor Records page.
• Factorization of Fermat Numbers compiled by Wilfrid Keller.
• Ray Ontko's Prime Numbers and Factoring page.
• Dario Alpern's Online ECM and SIQS Factorization Calculator.
• Xiao Gang's Online Factorer.
• Jeffrey Hamblin's Integer Factorization Project. Includes code for several factoring algorithms.
• Paul Herman's Factoring Page. Includes code for several factoring algorithms.
• Torbjörn Granlund's lists of factors of 10^n - 1 and 10^n + 1.
• Mitsuo Morimoto's Factors of Cyclotomic Numbers page.
• Arjen Bot's Factors for 2^n+1 for 1200 < n < 5000 and n prime page.
• Will Edgington's Mersenne numbers page.
• Number Theory Archives.
• Number Theory Web.
• Wolfgang Creyaufmueller's aliquot sequences page, which includes some factoring programs.
• John Savard's nontechnical factoring page.

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ACKNOWLEDGEMENT: Thanks to Richard Brent for pointing out several of these links, and giving many suggestions and remarks to improve FactorWorld!