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

L35, L42, L47, L49, L53 ... ... L193, L197, L613, L622, L1949
E-mail address:
Username RieselSieve (entry created on 12/22/2003 19:17:03 UTC)
Database id:581 (entry last modified on 5/11/2021 03:59:55 UTC)
Active primes:on current list: 9.5, rank by number 12
Total primes: number ever on any list: 31.5
Production score: for current list 48 (normalized: 26), total 48.4639, rank by score 13
Largest prime: 485767 · 23609357 - 1 ‏(‎1086531 digits) via code L622 on 6/25/2008 03:34:48 UTC
Most recent: 191249 · 23417696 - 1 ‏(‎1028835 digits) via code L1949 on 12/2/2010 21:23:32 UTC
Entrance Rank: mean 20.70 (minimum 17, maximum 29)

Descriptive Data: (report abuse)

A collective effort to solve the Riesel Problem using a very deep sieve while LLRing the lower range.

Surname: RieselSieve (used for alphabetizing and in codes).
Unverified primes are omitted from counts and lists until verification completed.
I administer Riesel Sieve Project and I would like to
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