by participants around the world. The twenty largest known prime numbers A list of the 5,000 largest known primes is maintained by Chris K. Caldwell, of which the twenty largest are listed below. See also List of largest known primes and probable primes References External links Press release about the largest known prime 282,589,933−1 Press release about the former largest known prime 277,232,917−1 Press release about the former largest known prime 274,207,281−1 Prime numbers Large integers Prime number Superlatives Great Internet Mersenne Prime Search Mersenne primes