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An exponent and prime problem (Posted on 2007-01-06) Difficulty: 2 of 5
Given that n is a positive prime number. Determine analytically all possible n such that 2n + n2 is a prime number.

See The Solution Submitted by K Sengupta    
Rating: 4.0000 (2 votes)

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re(2): needs a second attempt | Comment 4 of 6 |
(In reply to re: needs a second attempt by K Sengupta)

oh..I overlooked...perhaps i SHOULD go to bed right now...
  Posted by elementofsurprize on 2007-01-06 14:56:21

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