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Robert L. Clark


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): g12, L3972
E-mail address:
Username: Clark (entry created on 01/18/2000)
Database id:61 (entry last modified on 06/30/2018)
Active primes:on current list: 6 (unweighted total: 6), rank by number 163
Total primes: number ever on any list: 90 (unweighted total: 90)
Production score: for current list 46 (normalized: 6), total 47.7087, rank by score 485
Largest prime: 3303 · 21581274 + 1 ‏(‎476015 digits) via code L3972 on 06/17/2020
Most recent: 3303 · 21581274 + 1 ‏(‎476015 digits) via code L3972 on 06/17/2020
Entrance Rank: mean 3417.33 (minimum 3106, maximum 3899)

Descriptive Data: (report abuse)

Robert Clark has been interested in searching for primes since 1967, and is still loving it. He is a retired software engineer,father, writer, birder, choral singer, amateur astronomer, and bon vivant.

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