theorem proved term proof

`totient_two_pow_four`

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formal statement (Lean)

 795theorem totient_two_pow_four : totient (2 ^ 4) = 8 := by native_decide

Term-mode proof.

 796
 797/-- φ(3^k) values. -/

Lean names referenced from this declaration's body.

totient in IndisputableMonolith.NumberTheory.Primes.ArithmeticFunctions decl_use