OBM 2022 Problem 4
Initially, a natural number is written on the blackboard. Then, at each minute, Neymar chooses a divisor of , erases , and writes . If the initial number on the board is , what is the largest composite number that Neymar will never be able to write on the blackboard?
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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