lean_workbook_plus_54971

Open

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

Show that $18! \equiv -1 \pmod{437}$

Preamble

import Mathlib.Analysis.Complex.Basic

Formal statement

theorem lean_workbook_plus_54971 : 18! ≡ -1 [ZMOD 437]   :=  by sorry

Source