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)

Comments: ( Back to comment list | You must be logged in to post comments.)

re: Solution with mini-proof

| Comment 3 of 7 |

(In reply to Solution with mini-proof by SteveH)

Yep, sweet and complete.

Posted by owl on 2004-11-20 01:26:34

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