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Power and Divisibility Puzzle (Posted on 2015-08-12) Difficulty: 3 of 5
Determine the total number of positive integer values of N < 20150 such that:
2N - N2 is divisible by 17

No Solution Yet Submitted by K Sengupta    
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re: Analytic solution Comment 6 of 6 |
(In reply to Analytic solution by Jer)

Actually, 2^N has a cycle of 8, so the great-cycle is only 8*17 = 136. 
  Posted by Steve Herman on 2015-08-13 13:41:05

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