22339...12501 (121-digits)

This number is a prime.

                    2 2339836635 3576128356 4335541365 6371304547 8814077664
4505017498 8197692603 0924350328 1132591553 7777753191 6360245534 5786512501

Just showing those entries submitted by 'Caldwell': (Click here to show all)

(2^2*3^3*5^5*7^7*61^61) + 1 is prime. [Caldwell]