Directory: Top/Science/Math/Number

Top / Science / Math / Number_Theory / Factoring /

Factoris
Online calculator that factorizes large numbers, specified by formula.
http://wims.unice.fr/~wims/wims.cgi?lang=en&module=tool/algebra/factor.en&cmd=new&
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The Factor Zone
Aimed at grade school students and teachers, includes course guidelines, worksheets, and factor tables up to 600.
http://factorzone.tripod.com/
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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.
http://www.prothsearch.net/sierp.html
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I Love Binary, Primes, and Factors
Divisibility, primes and binary numbers.
http://home.earthlink.net/~usondermann/binary.html
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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
http://www.alpertron.com.ar/ECM.HTM
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Fermat Search
Leonid Durman's Fermat number factoring site and program.
http://www.fermatsearch.org/
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FactorWorld
Dedicated to algorithms and computational results on integer factorization. Includes links to papers, downloadable software, and online resources.
http://www.crypto-world.com/FactorWorld.html
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Factorization of RSA-155
Announcement of factorization of a 512-bit RSA key using the General Number Field Sieve (GNFS).
http://www.crypto-world.com/announcements/RSA155.txt
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The XYYXF Project
A collaborative project to produce the factorizations of x^y + y^x for 1<y<x<101.
http://xyyxf.at.tut.by/
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Factoring Papers
Links to papers on the theory and practice of factoring.
http://www.crypto-world.com/FactorPapers.html
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