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theorem proved term proof

totient_five_pow_two

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formal statement (Lean)

 803theorem totient_five_pow_two : totient (5 ^ 2) = 20 := by native_decide

proof body

Term-mode proof.

 804
 805/-! ### More concrete arithmetic function values -/
 806
 807/-- Ω(6) = 2 (since 6 = 2 × 3). -/

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