The board / number theory / #429
Erdős Problem #429
DISPROVED LEANdatabase updated 2026-01-29
The statement as posed is false. A solution has also been checked by machine, in Lean.
What the community database records, not our verdict. erdosproblems.com no longer shows statuses (why).
Is it true that, if \(A\subseteq \mathbb{N}\) is sparse enough and does not cover all residue classes modulo \(p\) for any prime \(p\), then there exists some \(n\in \mathbb{Z}\) such that \(n+a\) is prime for all \(a\in A\)? Weisenberg [We24] has shown the answer is no: \(A\) can be arbitrarily sparse and missing at least one residue class modulo every prime \(p\), and yet \(A+n\) is not contained in the primes for any \(n\in \mathbb{Z}\). (Weisenberg gives several constructions of such an \(A\).)
Statement as formalized in Formal Conjectures (Google DeepMind, Apache-2.0) · their label: research solved. The authoritative wording is on erdosproblems.com/429.Prizenone
Topicsnumber theory
Statement in LeanFormal Conjectures
Solution in Leanyes
Original pageerdosproblems.com/429
Attempts
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