#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
ifstream in("inversmodular.in");
ofstream out("inversmodular.out");

ll exp_log(ll x, ll n)
{
    if(n == 0) return 1;
    if(n%2) return x*exp_log(x*x%n, n/2)%n;
    return exp_log(x*x%n, n/2);
}

ll phi(ll n)
{
    ll result = n;
    for(int i = 2; i*i <= n; i++)
    {
        if(n%i == 0)
        {
            while(n%i == 0)
                n/=i;
            result -= result/i;
        }
    }
    if(n>1)
        result -= result/n;
    return result;
}

int main()
{
    ll a, n;
    in >> a >> n;
   for(ll i = 1; i < n; i++)
        if(a*i%n == 1)
        {
            out << i;
            return 0;
        }



    return 0;
}