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#include<bits/stdc++.h>

using namespace std;

vector<int> pr;
long long n,k,a,mx = 0;

void calc(long long x, vector<int>::iterator it)
{
    if(k/(*it) < x) {
        return;
    }
    x*=*it;
    if(x>k) {
        return;
    }
    mx = max(mx, x);
    while(it!=pr.end()) {
        calc(x, it);
        it++;
    }
}

int main()
{
    ios_base::sync_with_stdio(0);
    cin>>n>>k;
    for(int i = 0;i<n;i++) {
        cin>>a;
        pr.push_back(a);
    }
    for(auto it = pr.begin();it != pr.end();it++) {
        calc(1,it);
    }
    cout<<mx<<"\n";
}