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