The book is now available! 23
(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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There are exactly 23 prime-digit primes below one thousand, and 23 is one of them (more precisely the nth, where n is the (prime) sum of its digits). [Beedassy]


  Submitted: 2009-05-03 00:53:59;   Last Modified: 2009-05-03 11:19:03.

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