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373929373 is the smallest 9-digit bi-truncatable palindromic prime that remains palindromic after each truncation. A bi-truncatable prime remains prime even when both ends are truncated. I.e., 7392937, 39293, 929, and 2 are all primes. [Opao]

 

  Submitted: 2003-12-08 20:05:53;   Last Modified: 2008-01-30 11:28:00.



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