#include <iostream>
#include <fstream>

using namespace std;
ifstream fi("gfact.in");
ofstream fo("gfact.out");
int main()
{
    int p,q,s=0,nr=0,i,t;
    fi>>p>>q;
    for(i=p;s<q;i+=p)
    {
        if(p==1)
            break;
        t=i;
        nr=0;
        while(t>0)
        {
            if(t%p==0)
                nr++;
            t/=p;
        }
        s+=nr;
    }
    if(p!=1)
        fo<<i-p;
    else
        fo<<1;
    return 0;
}