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 g389, one of those codes.
Code name (*): g389 Persons (*): 2 (counting humans only) Projects (*): 0 (counting projects only) Display (HTML): Hirotomo, Ohigashi, PRP, Proth.exe Number of primes: total 2 Unverified Primes: 0 (prime table entries marked 'Composite','Untested', or 'InProcess') Score for Primes (*): total 34.6579
Below is additional information about this entry.
Display (text): Hirotomo, Ohigashi, PRP, Proth.exe Display (short): Hirotomo & Ohigashi Database id: 968 (do not use this database id, it is subject to change) Proof program: Proth.exe Entry last modified: 2020-09-27 11:50:16