#include <bits/stdc++.h>
using namespace std;

bool is_square(long long x) {
  if (x == 1) return true;
  long long ok = 5e9;
  long long ng = 0;
  while (abs(ok - ng) > 1) {
    long long m = (ok + ng) / 2;
    if (m * m == x) return true;
    else if (m * m > x) ok = m;
    else ng = m;
  }
  if (ok * ok == x) return true;
  else return false;
}

int main() {
  int t;
  cin >> t;
  while (t--) {
    int n;
    cin >> n;
    vector<long long> a(n);
    for (int i = 0; i < n; i++) {
      cin >> a[i];
    }
    for (int i = 0; i < n - 1; i++) {
      for (int j = i + 1; j < n; j++) {
        long long g = __gcd(a[i], a[j]);
        a[i] /= g;
        a[j] /= g;
      }
    }
    bool ok = true;
    for (int i = 0; i < n; i++) {
      if (is_square(a[i])) continue;
      ok = false;
    }
    cout << (ok ? "Yes" : "No") << endl;
  }
  return 0;
}