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The largest known prime such that removing the right-most digit leaves you with a right-truncatable positive integer which is divisible by the sum of its digits in base ten. Such integers are called Harshad (or Niven) numbers. [Earls]

 

  Submitted: 2004-08-28 08:38:41;   Last Modified: 2009-03-04 08:26:28.



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