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 p221, one of those codes.
Code name (*): p221 (See the descriptive data below.) Persons (*): 1 (counting humans only) Projects (*): 0 (counting projects only) Display (HTML): AndersonLee, NewPGen, OpenPFGW Number of primes: total 29 Unverified Primes: 0 (prime table entries marked 'Composite','Untested', or 'InProcess') Score for Primes (*): total 46.4039, on current list 45.8493 (normalized score 5) Entrance Rank (*): mean 98.50 (minimum 98, maximum 99)
Below is additional information about this entry.
Display (text): AndersonLee, NewPGen, OpenPFGW Display (short): AndersonLee Database id: 1316 (do not use this database id, it is subject to change) Proof program: PrimeForm The primes from this code accounts for 0.832% of the (active) primes and 0.544% of the (active) score for this program. Entry last modified: 2020-10-27 00:50:16