What's to know? There isn't even any solid evidence the man ever even existed for goodness sakes! That is Old Testament!!! Yikes!
We know for a fact he existed...sometime between 9000 and 15000 years ago give or take.
How do we know that?
There is evidence in papyrus scrolls
BIBLICAL ANTHROPOLOGY: Galit Dayan: "Jews" Lived in Dynastic Egypt
It describes the plagues;
In each of the Egyptian manuscripts Dayan discussed, the same familiar characters are mentioned: Moses (“an Egyptian name”), Pharoah, the Red Sea/Sea of Reeds (“Yam Suf” in Hebrew), Hebrews, Israelites and the presence of slaves in Egypt.
In one manuscript, known as the Ipuwer papyrus, there is an eerie description of chaos in Egypt: “Plague is throughout the land,” Dayan’s translation reads, “blood is everywhere — the river is blood ... and the hail smote every herd of the field ... the land is without light and there is a thick darkness throughout the land ... the Lord smote all the firstborn in the land of Egypt — from the firstborn of Pharoah that sat on his throne to the firstborn of the captive who was in the prison. ...”