Home > Science > Math > Number Theory > Factoring
Factoring numbers is a concept learnt with the introduction of divisibility in schools, yet the process can be exceptionally challenging and difficult. This category addresses topics from the basic divisibility tests to perfection and the general problem of extracting prime factors.
http://www.cs.uwaterloo.ca/~shallit/Papers/carissan.html
Built by a French amateur, E.-O. Carissan, around 1919. Shallit, Williams and Morain include photographs and references to their paper.
http://www.perfsci.com/freegoods.htm#fermat
Cash prizes for new factors of Fermat numbers Fn, for n = 12 through 22.
http://www.crypto-world.com/FactorPapers.html
Links to papers on the theory and practice of factoring.
http://wims.unice.fr/~wims/wims.cgi?lang=en&module=tool/algebra/factor.en&cmd=new&
Online calculator that factorizes large numbers, specified by formula.
http://www.crypto-world.com/announcements/RSA155.txt
Announcement of factorization of a 512-bit RSA key using the General Number Field Sieve (GNFS).
http://www.alpertron.com.ar/ECM.HTM
Java applet that can be used to find 20- or 30-digit factors of numbers or numerical expressions up to 1000 digits long. It also computes the number and sum of divisors, the Euler's totient and moebius functions, and the decomposition of the number in a sum of up to four squares.
http://homepage2.nifty.com/m_kamada/math/factorizations.htm
Factorizations of numbers composed of all the same digit except first and/or last.
http://www.crypto-world.com/FactorWorld.html
Dedicated to algorithms and computational results on integer factorization. Includes links to papers, downloadable software, and online resources.
http://www.fermatsearch.org/
Leonid Durman's Fermat number factoring site and program.
http://www.leyland.vispa.com/numth/factorization/main.htm
Paul Leyland's list of his own and other factorisations.
http://factorzone.tripod.com/
Aimed at grade school students and teachers, includes course guidelines, worksheets, and factor tables up to 600.
http://xyyxf.at.tut.by/
A collaborative project to produce the factorizations of x^y + y^x for 1<y<x<101.
Home > Science > Math > Number Theory > Factoring
Thanks to DMOZ, which built a great web directory for nearly two decades and freely shared it with the web. About us