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Reverse Rigor II (Posted on 2014-07-22) Difficulty: 3 of 5
Denote by R(N) the integer obtained by reversing the digits of a positive integer N.

Determine the largest integer that is certain to divide N4 - (R(N))4, with N > R(N), regardless of the choice of N.

No Solution Yet Submitted by K Sengupta    
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Some Thoughts re: possible computer solution | Comment 3 of 4 |
(In reply to possible computer solution by Charlie)

I beleve that your program does not address the 4th, or at least the 2nd power.
  Posted by Ady TZIDON on 2014-07-22 12:09:02

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