The book is now available! 72
(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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72 is the only number of the form pq * qp that lies between a twin prime pair, where p and q are distinct primes. [Kulsha]


  Submitted: 2000-10-28 10:48:41;   Last Modified: 2009-04-20 18:37:58.

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