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 L4521, one of those codes.
Code name (*): L4521 Persons (*): 1 (counting humans only) Projects (*): 1 (counting projects only) Display (HTML): Curtis, Srsieve, CRUS, LLR Number of primes: total 5 Unverified Primes: 0 (prime table entries marked 'Composite','Untested', or 'InProcess' Score for Primes (*): total 46.1242, on current list 45.5590 (normalized score 3) Entrance Rank (*): mean 1842.50 (minimum 1835, maximum 1850)
Below is additional information about this entry.
Display (text): Curtis, Srsieve, CRUS, LLR Display (short): Curtis Database id: 8376 (do not use this database id, it is subject to change) Proof program: LLR The primes from this code accounts for 0.041% of the (active) primes and 0.004% of the (active) score for this program. Entry last modified: 2021-07-24 01:37:23