977923

This number is a prime.

+ The largest of five primes, concatenated from the same three double-digit primes, 23, 79, 97. Note that it is also an emirp. The other four primes are, 237997, 239779, 792397, 799723. [Loungrides]

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