Thread: primes

suppose p and p square + 8 are prime. show that P cube +4 is also prime

Originally Posted by claudio411

suppose p and p square + 8 are prime. show that P cube +4 is also prime

Rewriting the question using LaTeX: Suppose and are prime, show that is also prime.

All primes other than 3 are of the form .



, which is divisible by 3.

So, 3 is the only prime such that is also prime. Then, is also prime.