The book is now available! 79
(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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Subtract 79 from 7!+9! and you will have another emirp. [Silva]

 

  Submitted: 2009-11-21 20:08:26;   Last Modified: 2009-11-22 22:59:09.



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