⊦ prime(n) ↔ 1 < n ∧ (∀ m. m | n → m = 1 ∨ m = n)
1 < m ∧ (∀ m0. m0 | m → m0 = 1 ∨ m0 = m) ⊦ 2 | m + 1 ↔ m ≠ 2
Used terms: m