Definition:Carmichael Number/Historical Note
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Historical Note on Carmichael Number
The first Carmichael number ($561$) was found by Robert Daniel Carmichael in $1909$.
Some sources report this as $1910$, but that was the date when the article was published.
Sources
- 1910: R.D. Carmichael: Note on a new number theory function (Bull. Amer. Math. Soc. Vol. 16, no. 5: pp. 232 – 238)
- 1998: David Nelson: The Penguin Dictionary of Mathematics (2nd ed.) ... (previous) ... (next): pseudoprime
- 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): pseudoprime