| 0 < i, j < i / j, j < i, prime(i / j), prime(j), j | i, 0 ≤ i, 2 ≤ i, ∀ j0. j < j0 ∧ j0 < i ∧ prime(j0) → ¬ j0 | i ⊦ prime(i) |
j < i, j < i / j, 0 < i, prime(j), prime(i / j), j | i, 2 ≤ i, 0 ≤ i, ∀ j0. j < j0 ∧ j0 < i ∧ prime(j0) → ¬ j0 | i ⊦ prime(i)