How many mathematicians won the 2015 Abel Prize?
2
2
2
2
2
2
2
2
2
3
2
3
2
1
3
2
1
3
2
1
3
2
1
3
4
2
1
3
4
2
1
5
3
4
2
1
5
3
4
2
1
5
3
4
2
1
5
3
4
2
1
5
3
4
2
1
5
3
4
1
5
3
4
1
5
3
4
1
5
3
4
1
7
5
3
4
1
7
5
3
4
6
1
7
5
3
4
6
0
1
7
5
3
4
6
1
0
7
5
4
6
1
7
5
0
4
6
7
5
4
6
0
7
5
4
6
7
5
4
6
7
8
5
6
7
8
5
6
7
8
9
6
7
8
9
6
7
8
9
6
10
7
8
9
6
10
7
8
9
6
10
7
8
11
9
6
10
13
7
8
11
9
6
10
13
7
8
11
9
6
10
13
7
8
11
9
6
10
13
8
11
9
6
10
13
8
11
9
10
13
12
8
11
9
10
13
12
8
11