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 reflects 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, L5606, L5626
E-mail address:
Username Clark (entry created on 1/18/2000 18:50:53 UTC)
Database id:61 (entry last modified on 12/18/2022 13:47:33 UTC)
Active primes:on current list: 5 (unweighted total: 5), rank by number 172
Total primes: number ever on any list: 100 (unweighted total: 100)
Production score: for current list 48 (normalized: 30), total 48.8967, rank by score 240
Largest prime: 198402358131072 + 1 ‏(‎1087577 digits) via code L5606 on 2/10/2024 01:31:03 UTC
Most recent: 198402358131072 + 1 ‏(‎1087577 digits) via code L5606 on 2/10/2024 01:31:03 UTC
Entrance Rank: mean 833.00 (minimum 665, maximum 933)

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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