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 c89, one of those codes.
Code name (*): c89 Persons (*): 2 (counting humans only) Projects (*): 0 (counting projects only) Display (HTML): Underwood, Broadhurst, Primo Number of primes: total 1 Unverified Primes: 0 (prime table entries marked 'Composite','Untested', or 'InProcess') Score for Primes (*): total 36.2364, on current list 36.2364 Entrance Rank (*): mean 57092.00 (minimum 57092, maximum 57092)
Below is additional information about this entry.
Display (text): Underwood, Broadhurst, Primo Display (short): Underwood & Broadhurst Database id: 8690 (do not use this database id, it is subject to change) Proof program: Primo The primes from this code accounts for 0.258% of the (active) primes and 0.464% of the (active) score for this program. Entry last modified: 2020-08-12 18:20:15