93783...47441 (25-digits)

This number is a prime.

                                                 93783 8182483624 9332547441

+ 1*22*333*4444*55555*666666*7777777 + 1 is prime. [Firoozbakht]

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