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 L5421, one of those codes.
Code name (*): L5421 Persons (*): 1 (counting humans only) Projects (*): 1 (counting projects only) Display (HTML): Iwasaki, LLR2, PSieve, Srsieve, PrimeGrid, LLR Number of primes: total 6 Unverified Primes: 0 (prime table entries marked 'Composite','Untested', or 'InProcess' Score for Primes (*): total 48.5104, on current list 48.5104 (normalized score 47) Entrance Rank (*): mean 760.33 (minimum 721, maximum 856)
Below is additional information about this entry.
Display (text): Iwasaki, LLR2, PSieve, Srsieve, PrimeGrid, LLR Display (short): Iwasaki Database id: 9480 (do not use this database id, it is subject to change) Proof program: LLR The primes from this code accounts for 0.122% of the (active) primes and 0.048% of the (active) score for this program. Entry last modified: 2022-12-02 13:50:12