This number is a prime.
(5791, 9157) is the only pair of distinct-digit odd-digit primes concatenated from a pair of double digit composite numbers, i.e., (57, 91). [Loungrides]
The next prime Hebrew year (5791) begins on the Earth's birthday, according to Archbishop James Ussher of Armagh. [Reynolds]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell