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erdos_252.variants.k_ge_five

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For a fixed `k ≥ 5`, is `∑ σ k n / n!` irrational?.

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Lean 4 Statement 
theorem erdos_252.variants.k_ge_five :
    answer(sorry) ↔ ∀ k ≥ 5, Irrational (erdos_252_sum k)
ID: ErdosProblems__252__erdos_252.variants.k_ge_five
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