This number is a prime.

                                                        809391435 4023690019

+ If 17^27 is the largest power of 17 that doesn't have a zero in its digits, then 8093914354023690019 is the sum of the products of digits of all of the positive powers of 17. [Gaydos]

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