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The only three-digit prime with digits a, b, c, such that a, b, c, ab, and bc are all prime, i.e., 3, 7, 3, 37, and 73 are all prime. [Seidov]

 

  Submitted: 2006-12-15 14:09:00;   Last Modified: 2008-01-30 11:28:00.



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