A modification of the Eberhart's conjecture proposed by Wagstaff (1983) which proposes that if is the th prime such that is a Mersenne prime, then
where is the Euler-Mascheroni constant.
A modification of the Eberhart's conjecture proposed by Wagstaff (1983) which proposes that if is the th prime such that is a Mersenne prime, then
where is the Euler-Mascheroni constant.
Weisstein, Eric W. "Wagstaff's Conjecture." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/WagstaffsConjecture.html