The book is now available! 1683
(another Prime Pages' Curiosity)
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1683 is the ONLY number N that can be expressed as a sum in exactly N ways using three distinct primes each time (the order of the primes in the sum is irrelevant). [Rivera]

 

  Submitted: 2003-06-11 16:06:02;   Last Modified: 2008-03-10 14:23:11.



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