Quote:
Originally Posted by bur
Let p and p^2+8 be prime. Prove that p^3+4 is also prime.
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So only if p=3 we can have both p and p^2+8 be prime.
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Or is it really just about showing that it only holds for p=3 and since 3^3+4=31 is prime, that's the proof?

Yup.
Last fiddled with by Dr Sardonicus on 20210826 at 15:56
