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A prime formed from summing n concatenated n times up to 158. I.e., 1 + 22 + 333 + ... + 158158158...158 (158 concatenated 158 times) is prime. [Earls]

 

  Submitted: 2004-09-04 08:17:13;   Last Modified: 2008-01-30 11:28:00.



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