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This near-repunit prime can be written as R23+6, where R stands for the nth repunit. It and R23 are in fact the largest known cases of a single group of ten numbers from (1)w0 to (1)w9 containing more than one prime.

 

  Submitted: 2004-09-05 23:35:40;   Last Modified: 2008-02-12 19:51:50.



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