# Carmichael number
Last edited: 2026-02-05
Carmichael number
A $z \in \mathbb{N}$ is called a Carmichael number if it is not prime and has no non-trivial Fermat witness .
Last edited: 2026-02-05
A $z \in \mathbb{N}$ is called a Carmichael number if it is not prime and has no non-trivial Fermat witness .