Error: No Such Proof-code in Database
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 x50, one of those codes.
This page displays a single proof-code. To do so, you must specify which using just one of the following.