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

int main()
{
#ifndef ONLINE_JUDGE
   freopen ("input.txt", "r", stdin);
   freopen ("output.txt", "w", stdout);
#endif
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    long long minn = LLONG_MAX,n,i,temp,k;
    cin >> n >> k;
    for (i = 1 ; i <= n ; i++)
    {
        cin >> temp;
        minn = min(minn,temp);
    }
    for (i = k; i > 1 ; i--)
    {
        if ((minn % i == 0) || (i % minn == 0))
        {
            cout << i;
            return 0;
        }
    }
    return 0;
}