Erdős problem 828 · problems.science

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

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3 retained statements2415f78e850a

FormalConjectures/ErdosProblems/

828.lean

Retained formal statement1 of 3

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

FormalConjectures/ErdosProblems/828.leanErdos828.erdos_8281 lineExact file

1True ↔ ∀ (a : ℤ), {n | ↑n.totient ∣ ↑n + a}.Infinite

OpenStatement only, no proof