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The sum of the terms in the open interval between 2 and 8 (i.e., 3+4+5+6+7) is 25, a prime square, and 25+2 = 3^3 = 27, a prime cube. Is 2 the ONLY number for this to be true? [Bergot]

 

  Submitted: 2018-04-06 12:53:51;   Last Modified: 2018-04-06 13:00:07.



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