The book is now available! 7856
(another Prime Pages' Curiosity)
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7856 = 2^4 * 491 and its successor 7857 = 3^4 * 97 are each the product of a prime and the 4th power of a prime. [Post]

 

  Submitted: 2009-08-04 18:51:08;   Last Modified: 2009-08-05 01:56:47.



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