674960891221

This number is a prime.

                                                               67 4960891221

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

+ 674960891221 = 1!1 + 2!2 + 3!3 + ... + 12!12 + 13!13. [Sandri]

Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell