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163 is the least number k such that decimal representation of 1/k has period of length 81. It is one of a few exceptions to the rule that k=3^(n+2) is the least number with 1/k having period 3^n. [Noe]

 

  Submitted: 2010-04-14 17:52:35;   Last Modified: 2010-04-19 20:25:17.



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