The board / number theory / #861
Erdős Problem #861
SOLVEDdatabase updated 2025-08-31
Resolved in some way other than a straight proof or disproof — usual for open-ended questions, or for multi-part problems whose parts went different ways.
What the community database records, not our verdict. erdosproblems.com no longer shows statuses (why).
Prizenone
Topicsnumber theory, sidon sets
Statement in Leannot yet
Solution in Leanno
Original pageerdosproblems.com/861
Attempts
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