On prime factors of Mersenne numbers

Ady Cambraia, Michael P. Knapp, Abílio Lemos +2

Let $(M_n{)}_{n\ge 0}$ be the Mersenne sequence defined by $M_n=2^n-1$. Let $\omega (n)$ be the number of distinct prime divisors of $n.$ In this short note, we present a description of th…