12121 Search
(Another of the Prime Pages' resources)
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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.)

Proof-code(s): L61, L62, L65, L66, L89, L107, L125, L151, L162, L590, L1153, L3023, L3033
E-mail address: 12121@vocabulate.com
Username: 12121search (entry created on 05/24/2004)
Database id:640 (entry last modified on 08/07/2014)
Active primes:on current list: 6.5, rank by number 15
Total primes: number ever on any list: 27.5
Production score: for current list 47 (normalized: 52), total 47.7732, rank by score 13
Largest prime: 121 · 24553899 - 1 ‏(‎1370863 digits) via code L3023 on 02/25/2012
Most recent: 27 · 23855094 - 1 ‏(‎1160501 digits) via code L3033 on 02/28/2012
Entrance Rank: mean 31.88 (minimum 21, maximum 76)

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

I administer 12121 Search and I would like to
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Surname: 12121search (used for alphabetizing and in codes)
Unverified primes are omitted from counts and lists until verification completed.