It is source code of distributed system with node CPU and GPU which calculating chain of bitcoin private key -> public key -> private key... for example: there is a public key in the first line, but it is private key for public key in second line etc 000000008AB76E2A7C558FBFE6947A62A4F12484-(111112w67YUUyvCNjcJcmsv6gHYHqMA6V) 8bdcde11b113cb0d6d123cc3aabc761107c104e8-(1DkXWof2gXWHJGdX7SfXBhvKuE5pyYFUJV) db76c181b630b68ba06dc97be1464425379c1dd8-(1M1RFKEnDiPXDc77T9UNsaJJwXC8EvAMeA) 8fbc5f17ffb104eeca0931cb85d809e3b258ae23-(1E71HiCFJJgtzKP6kvqUQmCqCqufEQbjC9)
Nodes send their results (only keys which begin "000000") to the server application then server application save their in data base (MySQL).