TUYMAADA 2008 Problem 2
Is it possible to arrange on a circle all composite positive integers not exceeding , so that no two neighbouring numbers are coprime?
Author: L. Emelyanov
Dataset text AI-MO AoPS. Quoted with source.
Solutions
No solution is on olymmath yet. Official and human solutions come first when they arrive. AI solutions come after them, with a label.
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