# 311

This number is a prime.

Just showing those entries submitted by 'Trotter': (Click here to show all)

311 is the eleventh three-digit prime for which the sum of the squares of its digits is also a prime. Note that the sum here is eleven as well. [Trotter]

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