20276...99999 (16217-digits)

This number is a probable-prime (likely to be a prime but we have not (re-)proven it on this site).

A gigantic prime that can be expressed as 53^(823+14) * 47^(823+13) * 43^(823+12) * 41^(823+11) * 37^(823+10) * 31^(823+9) * 29^(823+8) * 23^(823+7) * 19^(823+6) * 17^(823+5) * 13^(823+4) * 11^(823+3) * 7^(823+2) * 5^(823+1) * 3^823 * 2^(823-1) - 1. [Wallace]