#include <bits/stdc++.h>
using namespace std;
const long long inf = 1e9 + 5;
long long power(long long x, long long y) {
  long long res = 1;
  while (y > 0) {
    if (y & 1) res = res * x;
    y = y >> 1;
    x = x * x;
  }
  return res;
}
int32_t main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  cout.tie(NULL);
  ;
  long long t;
  cin >> t;
  while (t--) {
    long long n, k;
    cin >> n >> k;
    long long a[n];
    for (long long i = 0; i < n; i++) cin >> a[i];
    set<long long> s;
    bool f = 1;
    if (k == 1) {
      cout << "YES" << '\n';
      continue;
    }
    for (long long i = 0; i < n; i++) {
      if (a[i] == 0) continue;
      long long temp = a[i];
      while (temp > 0) {
        for (long long j = 0; j < 1e5; j++) {
          if (temp < power(k, j)) {
            temp -= power(k, j - 1);
            if (s.count(j - 1)) {
              f = 0;
              break;
            } else {
              s.insert(j - 1);
            }
            break;
          }
        }
      }
      if (f == 0 || temp != 0) {
        f = 0;
        break;
      }
    }
    cout << (f == 0 ? "NO" : "YES") << '\n';
  }
  return 0;
}
