Twin Prime Search
(Another of the Prime Pages' resources)
The Largest Known Primes Icon
  View this page in:   language help
GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

project 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.)

L202, L150, L204, L205, L206 ... ... L2832, L2900, L3121, L3196, L4960
E-mail address:
Web page:
Username: TPS (entry created on 01/17/2007)
Database id:949 (entry last modified on 07/09/2019)
Active primes:on current list: 14.5, rank by number 11
Total primes: number ever on any list: 1709
Production score: for current list 48 (normalized: 126), total 49.1815, rank by score 10
Largest prime: 2601087525 · 23321910 - 1 ‏(‎1000004 digits) via code L4960 on 10/21/2019
Most recent: 2601087525 · 23321910 - 1 ‏(‎1000004 digits) via code L4960 on 10/21/2019
Entrance Rank: mean 6781.50 (minimum 80, maximum 39878)

Descriptive Data: (report abuse)

The Twin Prime Search (TPS) is a distributed computing project that searches for large twin primes. It was founded on April 13 2006 by Michael Kwok, and it has found two twin primes that were the largest in the world at the time of discovery. It worked in collaboration with PrimeGrid from November 2006 - August 2009.

TPS currently works on two projects: a variable-n search that looks for twins between 144,000 and 151,000 digits long, and a subproject called "Operation Megabit Twin" that searches for twins and Sophie Germain primes that are over a million binary digits long. Primality testing can be done automatically using LLRnet and/or PRPnet, and sieving is done through manual reservations. See this thread for further information:

Happy prime (and twin) hunting!

I found a prime as a member of this group and I would like to

I administer Twin Prime Search and I would like to
Edit this page
Surname: TPS (used for alphabetizing and in codes)
Unverified primes are omitted from counts and lists until verification completed.