Template:Sequence of the Day for February 15

Intended for: February 15, 2012

Timetable

First draft entered by Alonso del Arte on November 13, 2011 based on a remark from Jonathan Vos Post ✓
Draft to be reviewed by December 15, 2011
Draft to be approved by January 15, 2012

The line below marks the end of the <noinclude> ... </noinclude> section.

{ 561, 1105, 1729, 2465, 2821, 6601, 8911, ... }

Ghatage and Scott prove using Fermat's little theorem that

(a + b) n ≡ a n + b n (mod n)

(the freshman’s dream) exactly when

n

is a prime or a Carmichael number.