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A prime number with distinct digits, each of which is a primitive root modulo that prime. There are only six such numbers and this one is the largest (the others are 53, 827, 2357, 6827, and 8237). [Vantieghem]

 

  Submitted: 2010-01-13 09:52:04;   Last Modified: 2010-01-13 14:15:58.



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