The book is now available! 2719
(another Prime Pages' Curiosity)
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In 1917, Ramanujan gave a short list of odd numbers which cannot be written as x2 + y2 + 10z2. Eighty years later it is was shown that 2719 is surely the largest such number (GRH). Did you notice 2719 is a permutation of the Hardy-Ramanujan number? [Ono1997] [Beedassy]

 

  Submitted: 2008-02-09 21:34:02;   Last Modified: 2008-03-22 22:06:16.



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