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Proof step 10 from proof prime-631 (previous step)

631 % i = 0, i * i ≤ 631, 0 < i, 1 < i, i < 26 ⊦ 20 ≤ i ∧ i < 30

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 11:
631 % i = 0, i * i ≤ 631, 0 < i, 1 < i, i < 20 ⊦

Rule argument

Additional information

Used simplifier rules: lels-01: ⊦ ¬ i ≤ j ↔ j < i; from specification int-abs%numlslsdel: j0 ≠ 0, j < j0 ⊦ i < (* j) → i < (* j0); from specification int-basic1