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