131731

This number is a prime.

+ The only emirp resulting from concatenation of three consecutive two-digit emirps. [Silva]

+ 13:17:31 is the smallest emirp time occurring simultaneously at emirp hours, emirp minutes and emirp seconds, on a 24-hour digit clock. [Loungrides]

+ The smallest emirp obtained from the concatenation of first emirps. [Silva]

Printed from the PrimePages <primes.utm.edu> © G. L. Honaker and Chris K. Caldwell