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Prime Number Arithmetic (Posted on 2004-11-19) Difficulty: 4 of 5

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, Well done. | Comment 2 of 6 |
(In reply to Solution with mini-proof by SteveH)

I agree.  Good job!
  Posted by Dustin on 2004-11-19 23:09:58

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