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import FormalConjectures.ErdosProblems.«689»Ben Green's Open Problem 45
Can we pick residue classes $a_p \pmod{p}$, one for each prime $p \leq N$, such that every integer $\leq N$ lies in at least 10 of them?
This file points to the canonical formalization in FormalConjectures.ErdosProblems.«689».