13931
This number is a prime.
The concatenation of all single-digit powers of three in
ascending and then descending order is a palindromic prime. [Leonardis]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell
This number is a prime.
The concatenation of all single-digit powers of three in
ascending and then descending order is a palindromic prime. [Leonardis]