perplexus.info :: Just Math : (p+5)/8 and (p+1)/4 = Prime Numbers

(p+5)/8 and (p+1)/4 = Prime Numbers (Posted on 2010-04-12)

Determine all possible value(s) of a prime number p such that each of (p+5)/8 and (p+1)/4 is a prime number.

See The Solution Submitted by K Sengupta

Rating: 3.0000 (1 votes)

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Trying

| Comment 2 of 5 |

Necessary condition: p must be 3 mod 8 e.g. 3 , 11 , 19

OBVIOUSLY NOT SUFFICENT .

Do not see how to solve analytically

Posted by Ady TZIDON on 2010-04-12 14:48:46

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