(A) Determine all possible prime numbers f such that each of (f+1)/2 and (f-1)/4 are prime numbers.

(B) What are the possible prime numbers g such that each of (g+1)/4 and (g-1)/2 are prime numbers?

(In reply to f and g by Paul)

Well done and congrats on accurately solving Part(A).

However, for Part (B), you seem to have omitted the value g =7 in your solution.

Edited on August 22, 2007, 5:34 am

Posted by K Sengupta on 2007-08-22 05:13:32