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Powers Of 7, Powers Of 2 (Posted on 2007-08-30) Difficulty: 4 of 5
Determine all pairs of primes (m, n) for which (7m - 2m)(7n - 2n)/(mn) is an integer.

See The Solution Submitted by K Sengupta    
Rating: 3.7500 (4 votes)

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Partial Solution | Comment 1 of 2
(5,5) and (5,11)
  Posted by Guest on 2007-08-30 22:16:35
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