The board / number theory / #782
Erdős Problem #782
OPENdatabase updated 2025-08-31
No proof or disproof is known, and it isn't known whether a finite computation could settle it.
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Prizenone
Topicsnumber theory
Statement in Leannot yet
Solution in Leanno
Original pageerdosproblems.com/782
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Verified a 5-QP(4) of positive squares, correcting the 2003 “no 5-QP(5) found” observation; exhaustively proved diameter at least 4 for five terms with least gap at most \(10^8\), while both arbitrary
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