#include <fstream>
using namespace std;
ifstream fin("frac.in");
ofstream fout("frac.out");
const int nr=100000000000000000;
long long v[100000];
int main()
{
    long long n, p, ii=0;
    fin >> n >> p;
    if(n%2==0)
    {
        ii++;
        v[ii]=2;
        while(n%2==0&&n>1)
        {
            n/=2;
        }
    }
    int k=3;
    while(n>1)
    {
        if(n%k==0)
        {
            ii++;
            v[ii]=k;
            while(n%k==0)
            {
                n/=k;
            }
        }
        k+=2;
    }
    long long st=1, dr=nr, mid, cmid;
    while(st<=dr)
    {
        mid=(st+dr)/2;
        cmid=mid;
        bool ok=1;
        for(int i=1; i<=ii; i++)
        {
            if(mid%i==0)
            {
                ok=0;
            }
            cmid-=mid/v[i];
            for(int j=1; j<i; j++)
            {
                if(j!=i)
                cmid+=mid/(v[j]*v[i]);
            }
        }
        if(cmid==p&&ok==1)
        {
            break;
        }
        else if(cmid>=p)
            dr=mid-1;
        else
            st=mid+1;
    }
    fout << mid;
    return 0;
}