Marcel Martin's Primo


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): F2, x1, x25, p40, p87 ... ... x14, CH10, CH11, x45, CH12
Active wild codes: ^c\d+
Code prefix:c
E-mail address:
Web page:
Username Primo (entry created on 8/25/2000 19:02:07 UTC)
Database id:46 (entry last modified on 4/21/2021 19:01:12 UTC)
Program Does *: general
Active primes:on current list: 307, rank by number 9
Total primes: number ever on any list: 1942
Production score: for current list 46 (normalized: 5), total 46.9492, rank by score 29
Largest prime: 10999999 + 308267 · 10292000 + 1 ‏(‎1000000 digits) via code CH10 on 2/19/2021 06:47:24 UTC
Most recent: (1049713153083 · 2917# · (567 · 2917# + 1) + 2310) · (567 · 2917# - 1)/210 + 9 ‏(‎3753 digits) via code c101 on 7/22/2023 08:01:39 UTC
Entrance Rank: mean 63421.45 (minimum 924, maximum 126262)

Descriptive Data: (report abuse)

Primo is a program that will test numbers that are not of any special form. This is far more difficult (and slower) than doing so for primes n with special forms (e.g., those where n+1 factors nicely).

Primo is a primality proving program based on the ECPP algorithm: Elliptic Curve Primality Proving. Given positive odd integers, Primo tests whether these integers are prime, and if they are it produces primality certificates. Primo is suitable for the checking of crypto-primes and to prove whether they are actually prime... or not.

Surname: Primo (used for alphabetizing and in codes).
Unverified primes are omitted from counts and lists until verification completed.
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