The book is now available! 540
(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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540 = sigma(5)*sigma(40). It is the smallest such number. [Firoozbakht]


  Submitted: 2009-05-26 11:36:32;   Last Modified: 2009-05-26 16:52:31.

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