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 p257, one of those codes.
Code name (*): p257 Persons (*): 1 (counting humans only) Projects (*): 0 (counting projects only) Display (HTML): Siemelink, Srsieve, OpenPFGW Number of primes: total 3 Unverified Primes: 0 (prime table entries marked 'Composite','Untested', or 'InProcess' Score for Primes (*): total 45.4851, on current list 45.4177 (normalized score 2) Entrance Rank (*): mean 461.00 (minimum 461, maximum 461)
Below is additional information about this entry.
Display (text): Siemelink, Srsieve, OpenPFGW Display (short): Siemelink Database id: 4332 (do not use this database id, it is subject to change) Proof program: PrimeForm The primes from this code accounts for 0.221% of the (active) primes and 0.222% of the (active) score for this program. Entry last modified: 2022-05-20 17:50:22