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2 player game with largest prime divisors

Source: I May Olympiad (Olimpiada de Mayo) 1995 L2 P1

September 17, 2022
number theorygamegame strategyDivisors

Problem Statement

Veronica, Ana and Gabriela are forming a round and have fun with the following game. One of them chooses a number and says out loud, the one to its left divides it by its largest prime divisor and says the result out loud and so on. The one who says the number out loud 11 wins , at which point the game ends. Ana chose a number greater than 5050 and less than 100100 and won. Veronica chose the number following the one chosen by Ana and also won. Determine all the numbers that could have been chosen by Ana.