import core.bitop, std.algorithm, std.ascii, std.bigint, std.conv, std.math,
    std.functional, std.numeric, std.range, std.stdio, std.string, std.random,
    std.typecons, std.container, std.format;
static import std.ascii;

// dfmt off
T lread(T = long)(){return readln.chomp.to!T();}
T[] aryread(T = long)(){return readln.split.to!(T[])();}
void scan(TList...)(ref TList Args){auto line = readln.split();
foreach (i, T; TList){T val = line[i].to!(T);Args[i] = val;}}
alias sread = () => readln.chomp();enum MOD = 10 ^^ 9 + 7;
alias PQueue(T, alias less = "a<b") = BinaryHeap!(Array!T, less);
// dfmt on

void main()
{
    long N, M;
    scan(N, M);
    auto A = aryread();
    auto H = A.map!("a/2")();
    auto C = A.map!cnt();
    // writeln(C);
    bool same(long x)
    {
        return C[0] == x;
    }

    // writeln(C.all!same());
    if (!C.all!same())
    {
        writeln(0);
        return;
    }
    long l = H.reduce!lcm();
    writeln((M / l + 1) / 2);
}

long cnt(long x)
{
    long ret;
    while ((x & 1) == 0)
    {
        ret++;
        x >>= 1;
    }
    return ret;
}

T lcm(T)(T a, T b)
{
    return (a * b) / gcd(a, b);
}
