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#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("divprim.in");
ofstream fout("divprim.out");
const int N=1000001;
char c[N];
long long mx,k[8][100001];
int main()
{
int i,n,j,s=0,m,mx2=0,t;
for(i=2; i<=1000000; i++)
{
if(c[i]==0)
{
for(j=i; j<=1000000; j+=i)
{
++c[j];
}
}
}
for(i=1;i<=7;i++)
{
for(j=2;j<=100000;j++)
{
if(c[j]==i)k[i][j]=j;
else k[i][j]=k[i][j-1];
}
}
fin>>t;
for(i=1;i<=t;i++)
{
fin>>n>>m;
fout<<k[m][n]<<'\n';
}
return 0;
}