On a conjecture of R. M. Murty and V. K. Murty II

Yuchen Ding, Victor Zhenyu Guo, Yu Zhang

Let ${\omega }^{\ast }(n)$ be the number of primes $p$ such that $p-1$ divides $n$. Assuming the Elliott--Halberstam Conjecture, we prove a conjecture posted by M. R. Murty and V. K. Murty in 20…