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theorem proved decidable or rfl

not_prime_one

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formal statement (Lean)

  30theorem not_prime_one : ¬ Nat.Prime 1 := by

proof body

Decided by rfl or decide.

  31  decide
  32
  33/-! ### Local aliases (optional convenience) -/
  34
  35/-- Repo-local alias for Mathlib’s `Nat.Prime` (kept transparent). -/

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depends on (2)

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