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

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A path on a chessboard from c5 to d4 in 13 straight queen moves that cover all squares is impossible.


  Submitted: 2016-06-28 13:29:09;   Last Modified: 2018-04-12 18:25:43.

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