Carmichael number

English

Etymology

Named after Robert Daniel Carmichael (1879–1967), American mathematician.

Noun

Carmichael number (plural Carmichael numbers)

(mathematics) A composite number $n$ that satisfies the modular arithmetic congruence relation $b^{n-1}\equiv 1{\pmod {n}}$ for all integers $1<b<n$ that are relatively prime to $n$ .

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