Carmichael numbers and least common multiples of $p-1$

Thomas Wright

For a Carmichael number $n$ with prime factors $p_1,\cdots ,p_m$, define $$K=GCD[p_1-1,\cdots ,p_m-1],$$ and let $C_{\nu }(X)$ denote the number of Carmichael numbers up to $X$ such that…