Let n>1. If (n^2)+2 is a prime show that 3 divides n.

Can anyone help me start this exercise? Thank you

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- Oct 15th 2008, 11:50 PMAlexHallprimes
Let n>1. If (n^2)+2 is a prime show that 3 divides n.

Can anyone help me start this exercise? Thank you - Oct 16th 2008, 12:21 AMOpalg