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Prime square with distinct digits (Posted on 2009-05-30) Difficulty: 2 of 5
Determine the maximum value of a positive prime N, such that none of the digits in the base ten representation of N2 occur more than once.

  Submitted by K Sengupta    
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Solution: (Hide)
The required maximum value of N is 21397 which gives N2 of 457831609.

For an explanation refer to the respective solutions submitted by Daniel in this location and by Charlie in this location.

Comments: ( You must be logged in to post comments.)
  Subject Author Date
SolutionUBASIC solutionCharlie2009-05-30 16:02:26
mathematica solutionDaniel2009-05-30 13:01:42
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