RU-ALLRUSSIAN 1988 Problem 6
- Answer
The numbers 1 and 2 are written on an empty blackboard. Whenever the numbers m and n appear on the blackboard the number may be written. Can we obtain (1) 13121, (2) 12131?
Dataset text NuminaMath olympiads. Quoted with source.
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13121 = 2^{a}3^{b} - 1, 12131 \neq 2^{a}3^{b} - 1
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