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 x28, one of those codes.
Code name (*): x28 (See the descriptive data below.) Persons (*): 1 (counting humans only) Projects (*): 0 (counting projects only) Display (HTML): Iskra Number of primes: total 22 Unverified Primes: 0 (prime table entries marked 'Composite','Untested', or 'InProcess' Score for Primes (*): total 44.3565, on current list 42.9211 Entrance Rank (*): mean 108.00 (minimum 108, maximum 108)
Below is additional information about this entry.
Display (text): Iskra Display (short): Iskra Database id: 146 (do not use this database id, it is subject to change) Proof program: unknown Entry last modified: 2022-05-26 18:50:23