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the entire directory
only in Number_Theory/Factoring
Description
Top
:
Science
:
Math
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Number Theory
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Factoring
(38)
Division Rules
(4)
Perfect Numbers
(10)
Software
@
(43)
Tables
(9)
See also:
Computers: Computer Science: Distributed Computing: Projects: Cryptography
(10)
Science: Math: Number Theory: Computational
(9)
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.
The Factor Zone
 Aimed at grade school students and teachers, includes course guidelines, worksheets, and factor tables up to 600.
Factoring Papers
 Links to papers on the theory and practice of factoring.
Factoris
 Online calculator that factorizes large numbers, specified by formula.
Factorization Using the Elliptic Curve Method
 Java applet that can be used to find 20 or 30digit 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.
Factorizations of Nearrepdigit Numbers
 Factorizations of numbers composed of all the same digit except first and/or last.
FactorWorld
 Dedicated to algorithms and computational results on integer factorization. Includes links to papers, downloadable software, and online resources.
Fermat Search
 Leonid Durman's Fermat number factoring site and program.
Integer Factorization
 Paul Leyland's list of his own and other factorisations.
Known Amicable Pairs
 A listing of all the known pairs of numbers, each of which is the sum of the aliquot divisors of the other. Complete for smaller numbers, and extending beyond 200 digits.
RSA Laboratories Factoring Challenge
 Numbers representative of those used in the RSA cryptosystem are offered for factor attempts with prizes. A Partition List challenge is also provided in order to encourage work on factoring in general.
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.
The XYYXF Project
 A collaborative project to produce the factorizations of x^y + y^x for 1<y<x<101.
Factoring Fermat Numbers
 Cash prizes for new factors of Fermat numbers Fn, for n = 12 through 22. (December 31, 2004)
Factorization of RSA155
 Announcement of factorization of a 512bit RSA key using the General Number Field Sieve (GNFS). (August 22, 1999)
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Last update: December 7, 2013 at 21:41:52 UTC 
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