# 1567

This number is a prime.

The smallest 4-digit prime p of the form 2^r*7^s-1, where r and s are primes. [Russo]

World War I lasted for 1567 days. [Baldwin]

(There is one curio for this number that has not yet been approved by an editor.)

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