User:Fasnon/sandbox3

Known megaprimes and mega PRPs
complete 1~250

Entries labelled "Prime" have been proved prime; those labelled "PRP" have not. See the article Probable prime. There are currently 412 proven mega primes.

All numbers from 10999999 through 10999999 + 593498 are known to be composite, and there is a very high probability 10999999 + 593499, a strong PRP, is actually the smallest megaprime.