#include <bits/stdc++.h>
#define FOR(i,a,b) for(int i=a;i<=b;++i)
#define int long long
using namespace std;
const int _=1e6+7;
int in(int S,int bit) {
    return (S>>bit)&1;
}
int hightbit(int x) {
    return __lg(x);
}
void solve() {
    int n;
    cin>>n;

    vector<int> a(n);
    for(auto& x:a) cin>>x;

    int ans=0;
    FOR(i,0,32) {
        int res=0;
        for(auto x:a) if(hightbit(x)==i) res++;
        // cout<<i<<" "<<res<<"\n";
        ans=max(ans,res);
    }
    cout<<ans<<"\n";
}
signed main() {
    #ifdef ONLINE_JUDGE
        ios::sync_with_stdio(false);cin.tie(0);
    #else
        freopen("a.in","r",stdin);
    #endif
    int T;
    cin>>T;
    while(T--) {
        solve();
    }   
    return 0;
}