47
47
The worst first move is 48.
97
47
48
48
Prime numbers have only two factors. You get 47 points, your opponent gets 1.
It's the highest prime number. Two factors. You get 47, your opponent gets 1.
47 you get 47 points they get 1
48
It's the highest prime number. It has two factors: 47 and 1. You get the 47, your opponent gets the 1.
Factor tree for 49:49/ \7 x 7497,7