Problem Statement

A Wagstaff prime is a prime number of the form (2^p + 1)/3 where the exponent p is an odd prime. (2^5 + 1)/3 = 11 is a Wagstaff prime because both 5 and 11 are primes. Find and show here the first 10 Wagstaff primes and their corresponding exponents p. Find and show here the exponents p corresponding to the next 14 Wagstaff primes (not the primes themselves) and any more that you have the patience for. When testing for primality, you may use a method which determines that a large number is probably prime with reasonable certainty. It can be shown (see talk page) that (2^p + 1)/3 is always integral if p is odd. So there's no need to check for that prior to checking for primality.

Let's start with the solution: