How Many Pharaohs Do We Really See?

How many pharaohs do we actually see in that time? How many ruled egypt? We it its very difficult to tell. For some periods we have really good records, and some periods we don't have any records at all. But i try to do a quick calculation, and at least 300 and i'm not making excuses for not begable to count them properly. That's an extraordinary amount of people for that time feared really well.