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theorem proved term proof

repunit_three_composite

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formal statement (Lean)

2368theorem repunit_three_composite : ¬ Prime 111 ∧ 111 = 3 * 37 := by native_decide

proof body

Term-mode proof.

2369
2370/-- 1111 = 11 × 101 is not prime (R_4 factors). -/

depends on (5)

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