Proof-code: CH12

Samuel Yates began, and this site continues, a database of the largest known primes. Primes in that database are assigned a proof-code to show who should be credited with the discovery as well as what programs and projects they used. (Discoverers have one prover-entry, but may have many proof-codes because they use a variety of programs...)

This page provides data on CH12, one of those codes.

Code name (*):CH12   (See the descriptive data below.)
Persons (*):2 (counting humans only)
Projects (*):0 (counting projects only)
Display (HTML):Propper, Batalov, OpenPFGW, Primo, CHG
Number of primes:total 3
Unverified Primes:0 (prime table entries marked 'Composite','Untested', or 'InProcess'
Score for Primes (*):total 39.2557, on current list 39.2557
Entrance Rank (*):mean 49807.33 (minimum 48950, maximum 50329)

Descriptive Data: (report abuse)
This code is used for proofs of generalized Lucas and Lehmer numbers and their primitive parts.
The following software was used:
(1) Pari-GP for cyclotomic (and, where appropriate, Aurifeuillian) factorizations of N^2-1.
(2) GMP-ECM, Msieve, YAFU and ggnfs for extracting PrP factors of such cyclotomic cofactors.
(3) Pari-GP and Primo (when needed) for proving these helpers prime.
(4) OpenPFGW for BLS tests with these prime helpers.
(5) Pari-GP for Coppersmith--Howgrave-Graham, Williams--Lenstra, or Konyagin--Pomerance proofs, where BLS was insufficient.
(6) David Broadhurst's (with J.Renze) CHGserve implementation for CHG
I am a member of this code and I would like to:
Edit the descriptive data above as:

Below is additional information about this entry.

Display (text):Propper, Batalov, OpenPFGW, Primo, CHG
Display (short):Propper & Batalov
Database id:9106 (do not use this database id, it is subject to change)
Proof program:CHG  The primes from this code accounts for 10.345% of the (active) primes and 0.011% of the (active) score for this program.
Entry last modified:2024-04-18 05:37:14
Printed from the PrimePages <> © Reginald McLean.