However, questionmark's point is critical. Ancient Egypt was not a slave-based economy, and a significant portion of its population was never slaves. The Old Testament reports something like 600,000 men of fighting age involved in the flight from Egypt, so when you add to that the number of old men, women, and children, the final figure would've approached two million people. Obviously that's not remotely realistic.
While the city of Pi-Rameses was a real place, and while it's mentioned in the Old Testament as one of the cities in which the Hebrews toiled for Pharaoh, this doesn't make Exodus a real event. All it really means is that the Hebrew scribes who penned the story of Exodus had access to old place names of the Egyptian kingdom. All told, many if not most events and places recorded in the Old Testament reveal a Holy Land and environs as was known around the seventh and sixth centuries BCE, but not the thirteenth century BCE when Ramesses II lived.
Ramesses I they say may have died from the plague of those few years, given rise to the frist son or king of that dynasty dying.
I do agree much of what was written were of places of the sixth centuries bc,but still these places may have excisted before and were known.
As far as the numbers of the Bible, the counting system was not realistic and were most likey exaggerated.