$m$ is a positive integer, and $ m > 1$,
Prove that if $(m - 1)! + 1$ is divisible by $m$, $m$ is a prime.
Solve this by making a contradiction.
My english isn't so well. Please help and thank you for your attention :)
$m$ is a positive integer, and $ m > 1$,
Prove that if $(m - 1)! + 1$ is divisible by $m$, $m$ is a prime.
Solve this by making a contradiction.
My english isn't so well. Please help and thank you for your attention :)