Number Theory | Wilson's Theorem Example

We give an example of an application of Wilson's Theorem.

[georgesadler]

Professor Penn, thank you for a solid application and explanation of Wilson's Theorem.

[denisrabotay]

didnt't understand the move from :
(p-1)(p-2)! ≡(p-1)(mod p)
to:
(p-2)!≡1(mod p)
p-1 is the inverse of itself, so you just dividing both side by p-1 ?

[PunmasterSTP]

Raising product? More like raising our knowledge! Thanks for sharing these wonderful videos.

[شيخةالحكمانية]

Thanks, plz How we Prove ( p - 2 ) ! ≡ 1 ( mod p ), where is a prime number.