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