John Renze's Coppersmith-Howgrave-Graham PARI script
(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): CH1, CH2, CH3, CH4, CH5, CH6, CH7, CH8, CH9
Code prefix:CH
E-mail address:
jrenze(at)yahoo(dot)com
Username: CHG (entry created on 09/11/2005)
Database id:797 (entry last modified on 07/16/2016)
Program Does *: classical
Active primes:on current list: 25, rank by number 20
Total primes: number ever on any list: 62
Production score: for current list 44 (normalized: 2), total 44.5044, rank by score 26
Largest prime: 3850500 + 3248918 - 1 ‏(‎405792 digits) via code CH9 on 07/16/2016
Most recent: (5872915091 - 1)/58728 ‏(‎71962 digits) via code CH2 on 02/04/2017
Entrance Rank: mean 28394.44 (minimum 3201, maximum 52811)

Descriptive Data: (report abuse)
A script which implements the lattice basis reduction methods of Coppersmith and Howgrave-Graham to search for divisors in residue classes. This is useful when a BLS test with a factorization percentage of more than 25% has been run. The script is available at the primeform e-mail group, under "CHG.GP."

Factorization percentage record: 26.14% by Broadhurst, Renze, and de Water (December 2005)

I administer John Renze's Coppersmith-Howgrave-Graham PARI script and I would like to
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Surname: CHG (used for alphabetizing and in codes)
Unverified primes are omitted from counts and lists until verification completed.