#include <iostream>
#include <fstream>
#include <vector>
#define int unsigned long long
using namespace std;
ifstream fin("frac.in");
ofstream fout("frac.out");

vector <int> v,prim;
bool ciur[1000005];
void precalc()
{
    ciur[1]=1;
    ciur[0]=1;
    for (int i=2; i*i<=1000000; i++)
        if (!ciur[i]) for (int j=i*i; j<=1000000; j+=i)
                ciur[j]=1;
    for (int i=2; i<=1000000; i++)
        if (!ciur[i]) prim.push_back(i);
}
int sub(int n,int a)
{
    int l=1<<n,s=0;
    for (int i=1; i<=l; i++)
    {
        int p=1,nr=0;
        for (int j=0; j<n; j++)
        {
            if (i & (1<<j)) p=p*v[j],nr++;
        }
        //cout<<p<<' ';
        if (nr%2==0) s+=a/p;
        else s-=a/p;
    }
    //cout<<'\n';
    return s;
}
int nrprime(int n,int a)
{
    int c=a,k=0,d=prim[k];
    while (d*d<=c)
    {
        int e=0;
        while (c%d==0)
        {
            c/=d;
            e++;
        }
        if (e) v.push_back(d);
        k++;
        d=prim[k];
    }

    if (c!=1) v.push_back(c);
    int p=sub(v.size(),n);
    v.clear();
    return p;
}
int n,x;
int32_t main()
{
    fin>>n>>x;
    precalc();
    cout<<nrprime(13,12);
    int st=1,dr=12000000000,ans=0;
    while (st<=dr){
        int mij=(st+dr)/2;
        int k=nrprime(mij,n);
        //cout<<k;
        if (k>=x) ans=mij,dr=mij-1;
            else st=mij+1;
    }
    fout<<ans;
    return 0;
}