A note on prime index of a certain subgroup in ${\mathbb{F}}_p^{\ast }$

Abstract

Under the generalized Riemann hypothesis, we illustrate that the ratio of the set of primes $p$ such that $⟨-1,2⟩$ has an odd prime index in ${\mathbb{F}}_p^{\ast }$ to the set of primes $p$ such that the subgroup has index greater than $2$ nears $46\%$.

Corrected "thousand" to "hundred" on the line 7 in the first paragraph