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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 17:35:29;   Last Modified: 2009-03-21 11:02:32.



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