12121 Search

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 reflects on the primes currently on the list. (Many of the terms that are used here are explained on another page.)

Proof-code(s):	L61, L62, L65, L66, L89, L107, L125, L151, L162, L590, L1153, L3023, L3033, L5183
E-mail address:	(e-mail address unpublished)
Username	12121search	(entry created on 5/24/2004 20:42:50 UTC)
Database id:	640	(entry last modified on 5/7/2021 17:25:20 UTC)
Active primes:	on current list: 2.5, rank by number 15
Total primes:	number ever on any list: 28
Production score:	for current list 49 (normalized: 69), total 49.4059, rank by score 10
Largest prime:	121 · 2^9584444 + 1 ‏(‎2885208 digits) via code L5183 on 11/20/2020 14:02:52 UTC
Most recent:	121 · 2^9584444 + 1 ‏(‎2885208 digits) via code L5183 on 11/20/2020 14:02:52 UTC
Entrance Rank:	mean 36.00 (minimum 22, maximum 60)

Descriptive Data: (report abuse)

12121search is a prime search for primes of the form 121*2^n-1. To join the search, please see the website at 12121.vocabulate.com

Primes found by this project:
121*2^2033941-1 Szymon Banka (1/28/2006)
121*2^1954243-1 Szymon Banka (1/21/2006)
121*2^1695499-1 Rodger Ewing (9/06/2005)
121*2^1589157-1 Frank Clowes (10/24/2005)
121*2^1526097-1 Frank Clowes (7/19/2005)
121*2^1039965-1 Frank Clowes (11/07/2004)
121*2^990219-1 Michael Haas, M.D. (08/13/2004)
121*2^541621-1 Frank Clowes (06/02/2004)
121*2^494317-1 Michael Haas, M.D. (06/03/2004)
121*2^410131-1 Frank Clowes (07/21/2004)
121*2^383061-1 JF Boyer (06/02/2004)
121*2^368059-1 JF Boyer (05/30/2004)
121*2^334257-1 Rodger Ewing (06/07/2004)
121*2^302097-1 Rodger Ewing (05/27/2004)

Sister projects:
3/23/2008 - 27*2^1108214-1 Arnold Padro
11/01/2005 - 27*2^777992-1 James Burt
7/14/2005 - 27*2^729314-1 William W. Mikrut
3/31/2005 - 27*2^627794-1 Chris Chatfield

In collaboration with PrimeGrid:
12/13/2009 - Peter Kaiser 27*2^1902689-1

Surname: 12121search (used for alphabetizing and in codes).
Unverified primes are omitted from counts and lists until verification completed.

I administer 12121 Search and I would like to