lean_workbook_plus_69769

Proved

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

If $a^2+1$ is divisible by $23$ , then prove that $a^{22}+1$ is also divisible by $23$ .

Preamble

import Mathlib.Analysis.Complex.Basic

Formal statement

theorem lean_workbook_plus_69769 (a : ℤ) (h : 23 ∣ a^2 + 1) : 23 ∣ a^22 + 1   :=  by sorry

Source