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Erdős problem / erdos

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Problem 828

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  1. vf_68c5548c0b922fe0

    theoretical

    Erdős Problem #828: declared status 'open'. Formalized: yes. Is it true that, for any a∈Za\in\mathbb{Z}, there are infinitely many nn such thatϕ(n)∣n+a?\phi(n) \mid n+a? Prize: no. Tags: number theory.

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