Factoring - Musharof Chy
Factoris
Online calculator that factorizes large numbers, specified by formula.
The Factor Zone
Aimed at grade school students and teachers, includes course guidelines, worksheets, and factor tab...
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...
FactorWorld
Dedicated to algorithms and computational results on integer factorization. Includes links to paper...
Factorization of RSA-155
Announcement of factorization of a 512-bit RSA key using the General Number Field Sieve (GNFS).
The XYYXF Project
A collaborative project to produce the factorizations of x^y + y^x for 1<y<x<101.
Factorizations of Near-repdigit Numbers
Factorizations of numbers composed of all the same digit except first and/or last.
Integer Factorization
Paul Leyland's list of his own and other factorisations.
Factoring Fermat Numbers
Cash prizes for new factors of Fermat numbers Fn, for n = 12 through 22.
Discovery of a Lost Factoring Machine
Built by a French amateur, E.-O. Carissan, around 1919. Shallit, Williams and Morain include photog...