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theorem proved term proof

repunit_index_twentythree

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formal statement (Lean)

2365theorem repunit_index_twentythree : Prime 23 := by native_decide

proof body

Term-mode proof.

2366
2367/-- 111 = 3 × 37 is not prime (R_3 factors as 3 × 37, RS-relevant: 37). -/

depends on (6)

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