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GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

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Richard McIntosh notes that the largest prime of the form (2^4p + 1)/17 has p = 317, but that (2^4p + 1)/17 is composite for all prime p with 317 < p < 10000. Nobody knows if there are any more such primes. [Post]


  Submitted: 2005-02-20 16:16:13;   Last Modified: 2008-01-30 11:28:00.

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