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Erdős problem 828

Is it true that, for any a∈Za \in \mathbb{Z}, there are infinitely many nn such that ϕ(n)∣n+a\phi(n) | n + a?

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Retained declaration

FormalConjectures/ErdosProblems/828.lean

Formal Conjectures

FormalConjectures/ErdosProblems/828.leanErdos828.erdos_8281 lineExact file
True ↔ ∀ (a : ℤ), {n | ↑n.totient ∣ ↑n + a}.Infinite
OpenStatement only, no proof

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