#include <iostream>
#include <cmath>
using namespace std;

int max(int a, int b)
{
    if (a >= b)
        return a;
    else
        return b;
}

int main()
{
    int i, j;
    cin >> i >> j;
    double minimum;
    double num = 0;
    int x;

    i = max(i, j - (int)(5 * (log(j) / log(2))));

    for (int m = 1; m * m <= i; m++)
    {
        if (i % m == 0 && i / m != m && m != 1)
            num = num + (m + (i / m));
        if (i % m == 0 && i / m == m || m == 1)
            num += m;
    }

    minimum = num / i;
    num = 0.0;
    x = i;

    for (int k = i + 1; k <= j; k++)
    {
        for (int m = 1; m * m <= k; m++)
        {
            if (k % m == 0 && k / m != m && m != 1)
                num = num + (m + (k / m));
            if (k % m == 0 && k / m == m || m == 1)
                num += m;
        }
        if (minimum > num / k)
        {
            minimum = num / k;
            x = k;
        }
        num = 0;
    }
    cout << x;
    return 0;
}