//  ____            _                  _                       _       _
// |  _ \ _   _ ___| |_    ___ _ __   | |_ ___ _ __ ___  _ __ | | __ _| |_ ___
// | |_) | | | / __| __|  / __| '_ \  | __/ _ \ '_ ` _ \| '_ \| |/ _` | __/ _ \
// |  _ <| |_| \__ \ |_  | (__| |_) | | ||  __/ | | | | | |_) | | (_| | ||  __/
// |_| \_\\__,_|___/\__|  \___| .__/___\__\___|_| |_| |_| .__/|_|\__,_|\__\___|
//                            |_| |_____|               |_|

//https://github.com/manta1130/Competitive_Programming_Template_Rust

#[macro_use]
mod input {

    use std;
    use std::io;

    const SPLIT_DELIMITER: char = ' ';

    #[macro_export]
    #[allow(unused_macros)]
    macro_rules! input {
    ( $($x:expr ),*) => {
        {
            let temp_str = input_line_str();
            let mut split_result_iter = temp_str.split_whitespace();
                $(
                let buf_split_result = split_result_iter.next();
                let buf_split_result = buf_split_result.unwrap();
                    ($x) = buf_split_result.parse().unwrap();
                )*
        }
    };
}

    #[allow(dead_code)]
    pub fn input_line_str() -> String {
        let mut s = String::new();
        io::stdin().read_line(&mut s).unwrap();
        s.trim().to_string()
    }

    #[allow(dead_code)]
    pub fn p<T>(t: T)
    where
        T: std::fmt::Display,
    {
        println!("{}", t);
    }

    #[allow(dead_code)]
    pub fn input_vector2d<T>(line: usize) -> Vec<Vec<T>>
    where
        T: std::str::FromStr,
    {
        let mut v: Vec<Vec<T>> = Vec::new();

        for _ in 0..line {
            let vec_line = input_vector();
            v.push(vec_line);
        }
        v
    }

    #[allow(dead_code)]
    pub fn input_vector<T>() -> Vec<T>
    where
        T: std::str::FromStr,
    {
        let mut v: Vec<T> = Vec::new();

        let s = input_line_str();
        let split_result = s.split(SPLIT_DELIMITER);
        for z in split_result {
            let buf = match z.parse() {
                Ok(r) => r,
                Err(_) => panic!("Parse Error"),
            };
            v.push(buf);
        }
        v
    }

    #[allow(dead_code)]
    pub fn input_vector_row<T>(n: usize) -> Vec<T>
    where
        T: std::str::FromStr,
    {
        let mut v = Vec::with_capacity(n);
        for _ in 0..n {
            let buf = match input_line_str().parse() {
                Ok(r) => r,
                Err(_) => panic!("Parse Error"),
            };
            v.push(buf);
        }
        v
    }

    pub trait ToCharVec {
        fn to_charvec(&self) -> Vec<char>;
    }

    impl ToCharVec for String {
        fn to_charvec(&self) -> Vec<char> {
            self.to_string().chars().collect::<Vec<_>>()
        }
    }
}

use input::*;
use std::cmp;
use std::collections::BTreeSet;
use std::ops;

fn gcd<T>(a: T, b: T) -> T
where
    T: ops::Add<Output = T> + ops::Rem<Output = T> + ops::Div<Output = T> + cmp::PartialEq + Copy,
{
    if b + b == b {
        return a;
    }
    gcd(b, a % b)
}

///最小公倍数を求める。
fn lcm<T>(a: T, b: T) -> T
where
    T: ops::Add<Output = T>
        + ops::Rem<Output = T>
        + ops::Div<Output = T>
        + ops::Mul<Output = T>
        + cmp::PartialEq
        + Copy,
{
    (a / gcd(a, b)) * b
}

fn main() {
    let (n, m): (usize, usize);
    input!(n, m);
    let a = input_vector::<usize>();
    let mut b = BTreeSet::new();
    for mut z in a.clone() {
        let mut buf = 0;
        while z > 0 {
            if z & 1 == 0 {
                buf += 1;
            } else {
                break;
            }
            z >>= 1;
        }
        b.insert(buf);
    }
    if b.len() != 1 {
        println!("0");
        return;
    }
    let mut l = 1;
    for z in a {
        l = lcm(l, z / 2);
    }
    if (m / l) % 2 == 1 {
        println!("{}", m / l / 2 + 1)
    } else {
        println!("{}", m / l/2);
    }
}


Measured memory_bytes: 8444