To be removed soon:   language help

Geoffrey Reynolds' gcwsieve


A titan, as defined by Samuel Yates, is anyone who has found a titanic prime. This page provides data on those that have found these primes. The data below only reflect on the primes currently on the list. (Many of the terms that are used here are explained on another page.)

L436, L447, L521, p234, p237 ... ... L4779, L4780, L4784, L4972, L4976
E-mail address:
Web page:
Username: gcwsieve (entry created on 08/08/2007)
Database id:1223 (entry last modified on 09/16/2019)
Program Does *: sieve
Active primes:on current list: 43, rank by number 15
Total primes: number ever on any list: 118
Production score: for current list 52 (normalized: 5361), total 52.8415, rank by score 11
Largest prime: 8508301 · 217016603 - 1 ‏(‎5122515 digits) via code L4784 on 03/22/2018
Most recent: 479216 · 38625889 - 1 ‏(‎4115601 digits) via code L4976 on 11/16/2019
Entrance Rank: mean 444.93 (minimum 13, maximum 4130)

Descriptive Data: (report abuse)

A sieve for generalised Cullen/Woodall numbers n*b^n+/-1, where n < 2^32, b < 2^32. This sieve requires an existing ABC file (as produced by MultiSieve) with all factors smaller than the greatest exponent n already removed. The algorithm is based on an idea of Harsh Aggarwal, implemented with the help of Mark Rodenkirch.

Surname: Gcwsieve (used for alphabetizing and in codes)
Unverified primes are omitted from counts and lists until verification completed.
I administer Geoffrey Reynolds' gcwsieve and I would like to
Edit this page
Printed from the PrimePages <> © Chris Caldwell.