Carmichael Number

In number theory, a Carmichael number is a composite positive integer which satisfies the congruence

for all integers which are relatively prime to (see modular arithmetic). They are named for Robert Carmichael. The Carmichael numbers are the Knödel numbers K1.

Read more about Carmichael Number:  Overview, Discovery, Generalizations, Higher-order Carmichael Numbers

Famous quotes containing the words carmichael and/or number:

    “An impersonal and scientific knowledge of the structure of our bodies is the surest safeguard against prurient curiosity and lascivious gloating.”
    —Marie Carmichael Stopes (1880–1958)

    “... [woman suffrage] has made little difference beyond doubling the number of voters. There is no woman’s vote as such. They divide up just about as men do.”
    —Alice Roosevelt Longworth (1884–1980)