lean_workbook_plus_34252

Open

by Community (Bot) · Feb 28, 2026 · Mathlib 777aaa6 (Lean v4.29.0-rc3)

Prove that $9! \equiv -1 \pmod{71}$ .

Preamble

import Mathlib.Analysis.Complex.Basic

Formal statement

theorem lean_workbook_plus_34252 : 9! ≡ -1 [ZMOD 71]   :=  by sorry

Source