lean_workbook_plus_7684

Proved

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

Prove $2^{40} \equiv 1 \pmod{31}$ .

Preamble

import Mathlib.Analysis.Complex.Basic

Formal statement

theorem lean_workbook_plus_7684 : 2 ^ 40 ≡ 1 [ZMOD 31]   :=  by sorry

Source