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 x20, one of those codes.
Code name (*): x20 (See the descriptive data below.) Persons (*): 3 (counting humans only) Projects (*): 0 (counting projects only) Display (HTML): Irvine, Broadhurst, Water Number of primes: total 2 Unverified Primes: 0 (prime table entries marked 'Composite','Untested', or 'InProcess' Score for Primes (*): total 35.3533, on current list 35.3315 Entrance Rank (*): mean 54018.00 (minimum 54018, maximum 54018)
Below is additional information about this entry.
Display (text): Irvine, Broadhurst, Water Display (short): Irvine, Broadhurst & Water Database id: 182 (do not use this database id, it is subject to change) Proof program: unknown Entry last modified: 2022-08-16 20:50:12