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Proof step 8 from proof prime-631 (previous step)

631 % i = 0, i * i ≤ 631, 0 < i, 1 < i, i < 26 ⊦

User applied rule insert lemma

And obtained the following new goals

Proof step 9:
20 ≤ i, i < 30 ⊦ i = 20 ∨ i = 21 ∨ i = 22 ∨ i = 23 ∨ i = 24 ∨ i = 25 ∨ i = 26 ∨ i = 27 ∨ i = 28 ∨ i = 29
Proof step 10:
631 % i = 0, i * i ≤ 631, 0 < i, 1 < i, i < 26 ⊦ 20 ≤ i ∧ i < 30

Rule argument

spec: inst: name: case-30 seq: 20 ≤ i, i < 30 ⊦ i = 20 ∨ i = 21 ∨ i = 22 ∨ i = 23 ∨ i = 24 ∨ i = 25 ∨ i = 26 ∨ i = 27 ∨ i = 28 ∨ i = 29 subst: [i] → [i] flags: current, []

Additional information

Used terms: i