Class number problem(英语:Class number problem) for comparison). This can be extended to an equivalence, as it is a consequence of Theorem 3 in Granville–Stark(英语:Harold
Soundararajan, K. The distribution of prime numbers. Granville, Andrew; Rudnick, Zeév (编). Equidistribution in number theory, an introduction. Proceedings of the
,若其三個因數都是質數,它是卡邁克爾數。 保羅·艾狄胥猜想有無限個卡邁克爾數,1994年 William Alford 、 Andrew Granville 及 Carl Pomerance 證明了這個命題。 此外,對於足夠大的 n {\displaystyle n} ,1至 n {\displaystyle