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 p259, one of those codes.
Code name (*): p259 Persons (*): 1 (counting humans only) Projects (*): 0 (counting projects only) Display (HTML): Underbakke, GenefX64, AthGFNSieve, OpenPFGW Number of primes: total 1 Unverified Primes: 0 (prime table entries marked 'Composite','Untested', or 'InProcess' Score for Primes (*): total 45.6772, on current list 45.6772 (normalized score 3) Entrance Rank (*): mean 47.00 (minimum 47, maximum 47)
Below is additional information about this entry.
Display (text): Underbakke, GenefX64, AthGFNSieve, OpenPFGW Display (short): Underbakke Database id: 4392 (do not use this database id, it is subject to change) Proof program: PrimeForm The primes from this code accounts for 0.215% of the (active) primes and 0.373% of the (active) score for this program. Entry last modified: 2021-10-15 22:37:23