The book is now available! 6
(another Prime Pages' Curiosity)
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The proper factors of 6 are 1, 2 and 3. Note that 2*6^3-1, 2*6^3+1, 3*6^2-1 and 3*6^2+1 are all prime numbers. [Hartley]

 

  Submitted: 2003-03-17 03:29:43;   Last Modified: 2008-01-30 11:28:00.



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