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

using uint = unsigned int;
using ll = long long;

#define CIN( LL , A ) LL A; cin >> A 
#define GETLINE( A ) string A; getline( cin , A ) 
#define GETLINE_SEPARATE( A , SEPARATOR ) string A; getline( cin , A , SEPARATOR ) 
#define UNTIE ios_base::sync_with_stdio( false ); cin.tie( nullptr ) 
#define FOR( VAR , INITIAL , FINAL_PLUS_ONE ) for( ll VAR = INITIAL ; VAR < FINAL_PLUS_ONE ; VAR ++ ) 
#define FOR_ITR( ARRAY , ITR , END ) for( auto ITR = ARRAY .begin() , END = ARRAY .end() ; ITR != END ; ITR ++ ) 
#define REPEAT( HOW_MANY_TIMES ) FOR_LL( VARIABLE_FOR_REPEAT , 0 , HOW_MANY_TIMES ) 
#define RETURN( ANSWER ) cout << ( ANSWER ) << endl; return 0 
#define DOUBLE( PRECISION , ANSWER ) cout << fixed << setprecision( PRECISION ) << ( ANSWER ) << endl; return 0 
#define MIN( A , B ) A < B ? A : B;
#define MAX( A , B ) A < B ? B : A;

template <typename T> inline T Absolute( const T& a ){ return a > 0 ? a : - a; }

int main()
{
  CIN( ll , T );
  FOR( i , 0 , T ){
    CIN( ll , N );
    list<ll> p{};
    FOR( j , 0 , N ){
      CIN( ll , Ai );
      auto itr = p.begin() , end = p.end();
      while( itr != end ){
	ll& pj = *itr;
	if( Ai % pj == 0 ){
	  ll count = 1;
	  while( Ai % pj == 0 ){
	    Ai /= pj;
	    count++;
	  }
	  if( count % 2 == 0 ){
	    itr = p.erase( itr );
	  } else {
	    itr++;
	  }
	} else {
	  itr++;
	}
      }
      ll pj = 2;
      {
	if( Ai % pj == 0 ){
	  ll count = 0;
	  while( Ai % pj == 0 ){
	    Ai /= pj;
	    count++;
	  }
	  if( count % 2 != 0 ){
	    p.push_back( pj );
	  }
	}
	pj += 1;
      }
      while( Ai != 1 ){
	if( Ai % pj == 0 ){
	  ll count = 0;
	  while( Ai % pj == 0 ){
	    Ai /= pj;
	    count++;
	  }
	  if( count % 2 != 0 ){
	    p.push_back( pj );
	  }
	}
	pj += 2;
      }
    }
    if( p.empty() ){
      cout << "Yes\n";
    } else {
      cout << "No\n";
    }
  }
  return 0;

}