| max_prime_divisor(i) * i0 = i, 2 ≤ i, i0 < 2, 0 ≤ i, 0 < i, i0 < i ⊦ prime(i) |
⊦ 0 < j → (j < 2 ↔ j = 1)
¬ 0 < i0, max_prime_divisor(i) * i0 = i, 2 ≤ i, i0 < 2, 0 ≤ i, 0 < i, i0 < i ⊦ prime(i)
0 < i0, max_prime_divisor(i) * i0 = i, 2 ≤ i, i0 = 1, 0 ≤ i, 0 < i, i0 < i ⊦ prime(i)
Used terms: i0