We just completed a major update. Let us know if anything is not working.
This number is a prime.
Single Curio View: (Seek other curios for this number)The product of first 421 positive even numbers minus 1 (i.e., 2^421*421!-1) is the smallest titanic prime of form 2^p*p!-1, where p is a prime. [Loungrides]
Submitted: 2016-06-16 11:29:03; Last Modified: 2018-12-28 22:15:12.
Printed from the PrimePages <primes.utm.edu> © G. L. Honaker and Chris K. Caldwell