code: boolean intersects(LongBitSet other) {
  		// Depends on the ghost bits being clear!
  		int pos = Math.min(numWords, other.numWords);
  		while (--pos >= 0) {
  			if ((bits[pos] & other.bits[pos]) != 0)
  				return true;
  		}
  		return false;
  	}
docs: returns true if the sets have any elements in common