The book is now available! 1568
(another Prime Pages' Curiosity)
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GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

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1568 = sigma(156)*phi(8). It is the smallest such number. [Firoozbakht]


  Submitted: 2009-06-05 04:56:20;   Last Modified: 2009-06-05 08:42:54.

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