#include<iostream>
#include<fstream>
using namespace std;
int ciur[1000001], v[1000001][8], t, n, k;
int main()
{
    freopen("divprim.in", "r", stdin);
    freopen("divprim.out", "w", stdout);
    ciur[1] = 1;
    for(int i = 2; i <= 1000000; i++)
    {
        if(ciur[i] == 0)
        {
            for(int j = i; j <= 1000000; j = j + i)
            {
                ciur[j]++;
            }
        }
    }
    cin >> t;
    for (int i = 1; i <= 1000000; i++)
    {
        for (int j = 1; j <= 7; j++)
        {
            v[i][j] = v[i - 1][j];
        }
        v[i][ciur[i]] = i;
    }
    for(int i = 1; i <= t; i++)
    {
        scanf("%d%d", &n,&k);
        cout << v[n][k] << '\n';
    }
}