x P(x) - m = prod_{positive integer k | m} (x - k) g(x)
P(x) in Z(x)
we know g(x) in Z(x)
let x = 0, -m = prod_{positive integer k | m} (-k) * g(0)
==> m must be a prime number
P(x) in Z(x)
we know g(x) in Z(x)
let x = 0, -m = prod_{positive integer k | m} (-k) * g(0)
==> m must be a prime number
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