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Possible Duplicate:
$n!+1$ being a perfect square

Solving $$x!+1=y^2$$ integer solutions,

example:$(4,5),(5,11),(7,71)$

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    http://math.stackexchange.com/questions/7938/n1-being-a-perfect-square/7940#79402012-10-01
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    You mean $(7, 71)$?2012-10-01
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    Do we need to play 20 questions to figure out what your question is? :)2012-10-01
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    This question is isomorphic to the question it contains in the sense that it has been recently closed.2012-10-01
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    I have given a proof in : http://math.stackexchange.com/a/1892315/1799402016-08-15

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