Just wondering what the following is called, and if anyone can point out a proof:
If P is prime, then (P-1)! Mod P = (P - 1)
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Just wondering what the following is called, and if anyone can point out a proof:
If P is prime, then (P-1)! Mod P = (P - 1)
I found something close: http://www.ajnpx.com/html/Math/Abstr...nsTheorem.html
Maybe the one you're talking about is derived from that?