The book is now available! 13361
(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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Five more semiprimes can be consecutively formed from 13361 by iterating the process described in A227942. Found by Charles R. Greathouse IV. Can you find a chain of greater length?


  Submitted: 2013-10-03 21:13:54;   Last Modified: 2016-07-23 12:43:46.

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