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 x15, one of those codes.
Code name (*): x15 Persons (*): 1 (counting humans only) Projects (*): 1 (counting projects only) Display (HTML): Earls, PrimeForm_egroup, OpenPFGW, Primo, Unknown Number of primes: total 1 Unverified Primes: 0 (prime table entries marked 'Composite','Untested', or 'InProcess' Score for Primes (*): total 39.5543
Below is additional information about this entry.
Display (text): Earls, PrimeForm_egroup, OpenPFGW, Primo, Unknown Display (short): Earls Database id: 1048 (do not use this database id, it is subject to change) Proof program: Unknown Entry last modified: 2021-09-20 05:37:17