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erdos_939

Specification

If $r≥4$ then can the sum of $r-2$ coprime $r$-powerful numbers ever be itself $r$-powerful?

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Lean 4 Statement 
theorem erdos_939 : answer(sorry) ↔ ∀ r ≥ 4, (Erdos939Sums r).Nonempty
ID: ErdosProblems__939__erdos_939
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