perplexus.info :: Numbers : Powers Of 7, Powers Of 2

Powers Of 7, Powers Of 2 (Posted on 2007-08-30)

Determine all pairs of primes (m, n) for which (7^m - 2^m)(7ⁿ - 2ⁿ)/(mn) is an integer.

See The Solution Submitted by K Sengupta

Rating: 3.7500 (4 votes)

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