lean_workbook_plus_46042

Proved

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

Note that $7^4 \equiv 1 (\mod 400)$

Preamble

import Mathlib.Analysis.Complex.Basic

Formal statement

theorem lean_workbook_plus_46042 : 7^4 ≡ 1 [ZMOD 400]   :=  by sorry

Source