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

signed main(){

  int64_t n,k;
  cin>>n>>k;
  vector<int64_t> a(n);
  for(auto& ai:a)cin>>ai;

  auto chmax = [](auto& a,auto b){if(a<b)a=b;};
  vector dp(1<<n,0ll);
  dp[0] = k;
  for(int b=0;b<(1<<n);++b){
    for(int i=0;i<n;++i){
      chmax(dp[b|(1<<i)],dp[b]%a[i]);
    }
  }
  int ans = (1<<(n+1))-1;
  ans = dp[ans];
  cout<<(ans)<<endl;

}