perplexus.info :: Just Math : Prime Number Arithmetic

Prime Number Arithmetic (Posted on 2004-11-19)

Find all primes p such that 2^p + p^2 is also prime.

Prove there are no others.

See The Solution Submitted by Erik O.

Rating: 4.1250 (8 votes)

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Concurrence

| Comment 4 of 7 |

Nicely done, Steve H

Posted by Steve Herman on 2004-11-21 12:22:22

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