using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Numerics;
using System.Text;
using System.Threading.Tasks;

namespace AtCorder
{
	public class Program
	{
		const long MOD = 1000000007;

		static void Main(string[] args)
		{
			var cin = new Scanner2();
			int n = cin.Int();
			long m = cin.Long();
			long[] a = cin.ArrayLong(n);
			for (int i = 0; i < n; i++) {
				a[i] /= 2;
			}

			long lcm = LCM(a, m);
			if (lcm < 0) {
				Console.WriteLine(0);
				return;
			}

			for (int i = 0; i < n; i++) {
				if (lcm / a[i] % 2 == 0) {
					Console.WriteLine(0);
					return;
				}
			}

			long ans = (m / lcm + 1) / 2;
			Console.WriteLine(ans);
		}

		public static long GCD(long[] values)
		{
			if (values.Length == 1) {
				return values[0];
			}

			long gcd = values[0];
			for (int i = 1; i < values.Length; ++i) {
				if (gcd == 1) {
					return gcd;
				}
				gcd = GCD(values[i], gcd);
			}

			return gcd;
		}

		public static long GCD(long a, long b)
		{
			if (a > b) {
				if (b == 0) {
					return a;
				}

				return GCD(b, a % b);
			} else {
				if (a == 0) {
					return b;
				}

				return GCD(a, b % a);
			}
		}

		public static long LCM(long a, long b)
		{
			return a / GCD(a, b) * b;
		}

		public static long LCM(long[] values, long limit)
		{
			if (values.Length == 1) {
				return values[0];
			}

			long lcm = values[0];
			for (int i = 1; i < values.Length; i++) {
				lcm = LCM(lcm, values[i]);
				if (lcm > limit || lcm < 0) {
					return -1;
				}
			}

			return lcm;
		}
	}


	public class Scanner2
	{
		private readonly char[] delimiter_ = new char[] { ' ' };
		private readonly string filePath_;
		private string[] buf_;
		private int index_;
		Func<string> reader_;

		public Scanner2(string file = "")
		{
			if (string.IsNullOrWhiteSpace(file)) {
				reader_ = Console.ReadLine;
			} else {
				filePath_ = file;
				var fs = new StreamReader(file);
				reader_ = fs.ReadLine;
			}
			buf_ = new string[0];
			index_ = 0;
		}

		public string Next()
		{
			if (index_ < buf_.Length) {
				return buf_[index_++];
			}

			string st = reader_();
			while (st == "") {
				st = reader_();
			}

			buf_ = st.Split(delimiter_, StringSplitOptions.RemoveEmptyEntries);
			if (buf_.Length == 0) {
				return Next();
			}

			index_ = 0;
			return buf_[index_++];
		}

		public int Int() => int.Parse(Next());
		public long Long() => long.Parse(Next());
		public double Double() => double.Parse(Next());

		public int[] ArrayInt(int N, int add = 0)
		{
			int[] Array = new int[N];
			for (int i = 0; i < N; i++) {
				Array[i] = Int() + add;
			}
			return Array;
		}

		public long[] ArrayLong(int N, long add = 0)
		{
			long[] Array = new long[N];
			for (int i = 0; i < N; i++) {
				Array[i] = Long() + add;
			}
			return Array;
		}

		public double[] ArrayDouble(int N, double add = 0)
		{
			double[] Array = new double[N];
			for (int i = 0; i < N; i++) {
				Array[i] = Double() + add;
			}
			return Array;
		}

		public void Save(string text)
		{
			if (string.IsNullOrWhiteSpace(filePath_)) {
				return;
			}

			File.WriteAllText(filePath_ + "_output.txt", text);
		}
	}
}

Measured memory_bytes: 27488