The book is now available! 253987
(another Prime Pages' Curiosity)
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The largest known "near-square" prime of the form (2^k - 1)^2 - 2 has index 253987. Discovered on May 7, 2007. [Emmanuel]

 

  Submitted: 2007-08-10 12:05:01;   Last Modified: 2009-08-04 23:11:08.



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