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 c4, one of those codes.
Code name (*): c4 Persons (*): 1 (counting humans only) Projects (*): 0 (counting projects only) Display (HTML): Broadhurst, Primo Number of primes: total 109 Unverified Primes: 0 (prime table entries marked 'Composite','Untested', or 'InProcess' Score for Primes (*): total 35.3617, on current list 34.0704 Entrance Rank (*): mean 44125.36 (minimum 28287, maximum 66294)
Below is additional information about this entry.
Display (text): Broadhurst, Primo Display (short): Broadhurst Database id: 132 (do not use this database id, it is subject to change) Proof program: Primo The primes from this code accounts for 3.571% of the (active) primes and 0.000% of the (active) score for this program. Entry last modified: 2021-06-13 02:37:31