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theorem proved term proof

weak_prime_fortythree

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formal statement (Lean)

2765theorem weak_prime_fortythree : Prime 43 ∧ Prime 41 ∧ Prime 47 ∧ 43 < (41 + 47) / 2 := by native_decide

proof body

Term-mode proof.

2766
2767/-- 47 is a weak prime: 47 < (43 + 53)/2 = 48. -/

depends on (5)

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