e-sygoing.link — Factoring https://e-sygoing.link Latest links in the Factoring category en-us Sun, 24 May 2026 13:54:24 -0400 Factorization of F10 https://e-sygoing.link/link/5280322-factorization-of-f10 F10 = 2^(2^10) + 1 is the 10-th Fermat number. Richard Brent describes his discovery of the two largest factors. Tue, 24 Feb 2026 02:45:51 -0500 https://e-sygoing.link/go/5280322 N!+-1 Factoring Status https://e-sygoing.link/link/5280309-n-1-factoring-status Factoring efforts that have been made so far on numbers of the form n!+-1 using ECM factoring. Fri, 06 Feb 2026 07:38:24 -0500 https://e-sygoing.link/go/5280309 Computing Aurifeuillian factors https://e-sygoing.link/link/5280321-computing-aurifeuillian-factors Algorithm that finds non-trivial factors of certain numbers of the form a^b +/- 1. Fri, 19 Dec 2025 05:33:23 -0500 https://e-sygoing.link/go/5280321 Integer Factorization https://e-sygoing.link/link/5280323-integer-factorization Paul Leyland's list of his own and other factorisations. Sat, 08 Nov 2025 11:31:19 -0500 https://e-sygoing.link/go/5280323 Paul Herman's Factoring Page https://e-sygoing.link/link/5280318-paul-hermans-factoring-page A thorough summary of many major factoring methods. Includes some source code on many pages, gentle introductions to the more complex methods and further links. Sat, 27 Sep 2025 03:01:38 -0400 https://e-sygoing.link/go/5280318 Factoring Fermat Numbers https://e-sygoing.link/link/5280324-factoring-fermat-numbers Cash prizes for new factors of Fermat numbers Fn, for n = 12 through 22. Sun, 14 Sep 2025 09:02:43 -0400 https://e-sygoing.link/go/5280324 The Anti-Divisor https://e-sygoing.link/link/5280314-the-anti-divisor A definition and description of the Anti-Divisor, and some related results. Thu, 28 Aug 2025 09:53:23 -0400 https://e-sygoing.link/go/5280314 Discovery of a Lost Factoring Machine https://e-sygoing.link/link/5280326-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. Wed, 05 Feb 2025 20:53:25 -0500 https://e-sygoing.link/go/5280326 Factorization Using the Elliptic Curve Method https://e-sygoing.link/link/5280312-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 sum of up to four squares. Wed, 18 Dec 2024 18:35:36 -0500 https://e-sygoing.link/go/5280312 Factoris https://e-sygoing.link/link/5280305-factoris Online calculator that factorizes large numbers, specified by formula. Fri, 13 Sep 2024 22:40:01 -0400 https://e-sygoing.link/go/5280305