The book is now available! 178697
(another Prime Pages' Curiosity)
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The smallest emirp that is the sum of a triangular number and its reversal (91378+87319=178697). It is also expressible as the sum of two squares (419^2+56^2). [Bajpai]

 

  Submitted: 2016-07-26 14:43:49;   Last Modified: 2016-07-26 14:45:29.



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