#include <fstream>

using namespace std;
int putere(long long mid,int p,int q)
{
    int ci,cci=1;
    if(p==1)
        q=0;
    else
        for(int i=2;i<=mid;i+=cci)
        {
            ci=i;
            if(ci%p==0)
            {
                cci=p;
                while(ci%p==0)
                {
                    q--;
                    ci/=p;
                }
            }
        }
    return q;
}
int main()
{
    ifstream in ("gfact.in");
    ofstream out ("gfact.out");
    int st=1,p,q;
    long long mid,rez,dr;
    in>>p>>q;
    dr=p*q;
    while(st<=dr)
    {
        mid=(st+dr)/2;
        if(putere(mid,p,q)>0)
            st=mid+1;
        else
        {
            rez=mid;
            dr=mid-1;
        }
    }
    out<<rez;
    return 0;
}