perplexus.info :: Just Math : Factorials and Powers

Factorials and Powers (Posted on 2009-04-22)

Determine all possible pair(s) (X, Y), with X being a prime and Y being a positive integer, that satisfy this equation:

(X-1)! + 1 = X^Y

No Solution Yet Submitted by K Sengupta

Rating: 4.0000 (2 votes)

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re: Solution

| Comment 5 of 10 |

(In reply to Solution by Rosy)

(2,1) , (3,1) & (5,2)

it seems like for Y>=2 solutions are not possible !!

RHS goes out of proportion !!

Posted by Rosy on 2009-04-22 14:51:50

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