Let be a prime number. Stating any results that you use, deduce that xº-1 = (x – 1)(x – 2) · . · (x – (p – 1)) (mod p), •. and so for p > 3, (p – 1)! = -1 (mod p).

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter1: Fundamental Concepts Of Algebra
Section1.2: Exponents And Radicals
Problem 90E
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Let p be a prime number. Stating any results that you use, deduce that
x²-1 = (x – 1)(x – 2) ... (x – (p – 1)) (mod p),
•.
and so for p > 3, (p – 1)! = -1 (mod p).
1 (mod p).
Transcribed Image Text:Let p be a prime number. Stating any results that you use, deduce that x²-1 = (x – 1)(x – 2) ... (x – (p – 1)) (mod p), •. and so for p > 3, (p – 1)! = -1 (mod p). 1 (mod p).
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