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 p423, one of those codes.
Code name (*): p423 Persons (*): 2 (counting humans only) Projects (*): 0 (counting projects only) Display (HTML): Propper, Batalov, EMsieve, OpenPFGW Number of primes: total 5 Unverified Primes: 1 (prime table entries marked 'Composite','Untested', or 'InProcess' Score for Primes (*): total 48.5693, on current list 48.5693 (normalized score 62) Entrance Rank (*): mean 724.00 (minimum 174, maximum 1716)
Below is additional information about this entry.
Display (text): Propper, Batalov, EMsieve, OpenPFGW Display (short): Propper & Batalov Database id: 9465 (do not use this database id, it is subject to change) Proof program: PrimeForm The primes from this code accounts for 1.073% of the (active) primes and 6.534% of the (active) score for this program. Entry last modified: 2021-10-22 06:37:19