Marcel Martin's Primo (was Titanix and Certifix)
(Another of the Prime Pages' resources)
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program 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): F2, x1, x25, p40, p87 ... ... x38, x39, p298, x14, CH10
Active wild codes: ^c\d+
Code prefix:c
E-mail address:
Web page:
Username: Primo (entry created on 08/25/2000)
Database id:46 (entry last modified on 06/28/2017)
Program Does *: general
Active primes:on current list: 383, rank by number 5
Total primes: number ever on any list: 1711
Production score: for current list 41 (normalized: 0), total 45.6360, rank by score 27
Largest prime: Phi(5, (1121302646 · 16001#/5 + 1) · (28633 · 16001# - 1)9) ‏(‎276344 digits) via code x38 on 08/12/2014
Most recent: p(130243561) ‏(‎12705 digits) via code c85 on 09/09/2017
Entrance Rank: mean 58172.83 (minimum 10499, maximum 110142)

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.

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