perplexus.info :: Just Math : Prime and Twice Square

Prime and Twice Square (Posted on 2016-10-22)

Determine all possible values of a prime number P such that each of P+1 and P² + 1 is twice a perfect square.

Prove that these are the only ones.

See The Solution Submitted by K Sengupta

Rating: 4.0000 (3 votes)

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re: A solution................all possible values?

| Comment 2 of 4 |

(In reply to A solution by Math Man)

...."Determine all possible values.....Prove that these are the only ones...

Did you?

Posted by Ady TZIDON on 2016-10-22 13:21:21

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