733353337

This number is a prime.

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

+ If you place this palindromic prime in a 3-by-3 square,

7  3  3
3  5  3
3  3  7
then each column and diagonal, sum of each column and diagonal, along with the total sum digits is prime. [Blanchette]

Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell