6247

This number is a prime.

+ The smallest prime which is sum of composite numbers written with the first primes repeated twice for each term, i.e., 6247 = 22 + 33 + 55 + 77 + 1111 + 1313 + 1717 + 1919. [Capelle]

(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