«Number Theory»  : Factoring


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«Number Theory»  : Factoring Sites
Science Math Number Theory Factoring
Science Math Number Theory Factoring sites
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Science Math Number Theory Factoring
Science Math Number Theory Factoring sites
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Discovery of a Lost Factoring Machine
Built by a French amateur , E. -O. Carissan , around 1919. Shallit , Williams and Morain include photographs and references to their paper.
www.cs.uwaterloo.ca/~shallit/Papers/carissan.html
Factoring Fermat Numbers
Cash prizes for new factors of Fermat numbers Fn , for n = 12 through 22.
www.perfsci.com/freegoods.htm#fermat
Factoring Papers
Links to papers on the theory and practice of factoring.
www.crypto-world.com/FactorPapers.html
Factoris
Online calculator that factorizes large numbers , specified by formula.
wims.unice.fr/~wims/wims.cgi?lang=en&module=tool/algebra/factor.en&cmd=new&
Factorization of RSA-155
Announcement of factorization of a 512-bit RSA key using the General Number Field Sieve (GNFS).
www.crypto-world.com/announcements/RSA155.txt
Factorization Using the Elliptic Curve Method
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
www.alpertron.com.ar/ECM.HTM
Factorizations of Near-repdigit Numbers
Factorizations of numbers composed of all the same digit except first and/or last.
homepage2.nifty.com/m_kamada/math/factorizations.htm
FactorWorld
Dedicated to algorithms and computational results on integer factorization. Includes links to papers , downloadable software , and online resources.
www.crypto-world.com/FactorWorld.html
Fermat Search
Leonid Durman's Fermat number factoring site and program.
www.fermatsearch.org/
Integer Factorization
Paul Leyland's list of his own and other factorisations.
www.leyland.vispa.com/numth/factorization/main.htm
Sierpinski Problem
Sierpinski proved there exist infinitely many odd integers k such that k*2^n+1 is composite for every n. Ray Ballinger coordinates a search to prove or disprove whether k=78557 is the smallest solution.
www.prothsearch.net/sierp.html
The Factor Zone
Aimed at grade school students and teachers , includes course guidelines , worksheets , and factor tables up to 600.
factorzone.tripod.com/
The XYYXF Project
A collaborative project to produce the factorizations of x^y + y^x for 1< y< x< 101.
xyyxf.at.tut.by/

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