David Underbakke


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): g144, x22, g205, g216, p53, p57, x35, p100, g294, g295, p101, g359, L99, p222, p259, g429
E-mail address:
Username Underbakke (entry created on 6/6/2000 16:12:20 UTC)
Database id:260 (entry last modified on 2/5/2013 23:29:47 UTC)
Active primes:on current list: 4 (unweighted total: 4), rank by number 217
Total primes: number ever on any list: 3198.83 (unweighted total: 3728)
Production score: for current list 46 (normalized: 4), total 46.9021, rank by score 730
Largest prime: 689186131072 + 1 ‏(‎765243 digits) via code g429 on 2/5/2013 23:31:26 UTC
Most recent: 689186131072 + 1 ‏(‎765243 digits) via code g429 on 2/5/2013 23:31:26 UTC
Entrance Rank: mean 5800.50 (minimum 47, maximum 11525)

Descriptive Data: (report abuse)

David is independent software developer from Minnesota, USA. One of his hobbies includes writing the sieving (AthGfn64) and probability testing software (GenefX64) used in his searches. Proth or PFGW are only used in the final proof/double check for probable primes found.

Surname: Underbakke (used for alphabetizing and in codes).
Unverified primes are omitted from counts and lists until verification completed.
I am David Underbakke and I would like to
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