using System; using static System.Console; using System.Linq; using System.Collections.Generic; class Program { static int NN => int.Parse(ReadLine()); static int[] NList => ReadLine().Split().Select(int.Parse).ToArray(); static int[][] NArr(long n) => Enumerable.Repeat(0, (int)n).Select(_ => NList).ToArray(); static int[] NMi => ReadLine().Split().Select(c => int.Parse(c) - 1).ToArray(); static int[][] NMap(int n) => Enumerable.Repeat(0, n).Select(_ => NMi).ToArray(); static string[] SList(long n) => Enumerable.Repeat(0, (int)n).Select(_ => ReadLine()).ToArray(); static long[] LList(long n) => Enumerable.Repeat(0, (int)n).Select(_ => long.Parse(ReadLine())).ToArray(); public static void Main() { Solve(); } static void Solve() { var c = NList; var (n, k) = (c[0], c[1]); var a = NList; Array.Sort(a, (l, r) => r.CompareTo(l)); var bitmax = 1 << n - 1; var ans = 0; for (var b = 1; b < bitmax; ++b) { var tmp = b; var x = k; for (var i = 0; i + 1 < n; ++i) { if (tmp % 2 == 1) x %= a[i]; tmp >>= 1; } ans = Math.Max(ans, x % a[^1]); } WriteLine(ans); } }