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Division (Posted on 2004-12-11)

For which positive integer values of N is 2^N-1 a multiple of N?

See The Solution Submitted by e.g.

Rating: 3.8333 (6 votes)

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re: Really Hard?

| Comment 9 of 17 |

(In reply to Really Hard? by Richard)

I was thinking in that line of thought at first. But we'll need to generalize the formula for ord_n2 which is pretty difficult to do. Besides we'll need to show that ord_n2 does not divide n, which is even harder. =[

So prove by contradiction is my best bet.

Posted by Bon on 2004-12-12 19:15:17

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