733353337

This number is a prime.

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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]

Submitted: 2000-12-03 23:35:29; Last Modified: 2009-03-21 16:02:32.