The board / number theory / #1204
Erdős Problem #1204
OPENdatabase updated 2026-04-04
No proof or disproof is known, and it isn't known whether a finite computation could settle it.
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proved the residue-vector and reflection reductions, exhaustively verified \(A(k)\), \(B(k)\), and greedy \(B\)-optimality for \(1\leq k\leq22\), and derived conditional liminf constants \(1/2\) and \
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