22059819805104914321

This number is a prime.

                                                       2205981980 5104914321

+ Prime basenumber p of a palindromic heptagonal of length 40 {p(5p - 3)/2 = 1216589124584247550110557424854219856121}. [De Geest]

Printed from the PrimePages <primes.utm.edu> © G. L. Honaker and Chris K. Caldwell