The story
Named after Robert Daniel Carmichael (1879–1967), American mathematician.
Etymology from Wiktionary, CC BY-SA 4.0.
Carmichael number
Today it means: A composite number n that satisfies the modular arithmetic congruence relation bⁿ⁻¹≡1(mod n) for all integers 1<b<n that are relatively prime to n. Full definition →