The book is now available! 5
(another Prime Pages' Curiosity)
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The nth Prime Page will now find any of the first 2.623˙1015 primes or π(x) for x up to 1017.

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Every positive integer can be written as x2+2y2+7z2+11w2, except for 5. [Halmos1938] [Caldwell]


  Submitted: 2008-03-14 19:19:45;   Last Modified: 2008-07-30 21:39:02.

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