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theorem proved term proof

chen_prime_thirtyone

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formal statement (Lean)

2307theorem chen_prime_thirtyone : Prime 31 ∧ isSemiprime 33 = true := by native_decide

proof body

Term-mode proof.

2308
2309/-- 37 is a Chen prime: 37+2 = 39 = 3×13 is semiprime (RS-relevant). -/

depends on (6)

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