@Matthew Dude, Breasted thought, before the radiometric dating, that the Early Dynastic Period (AKA, the time of Narmer) begun at around 3400 BC, that is, the 35st century BC. Shaw thought, and radiometric dating was available to him, that it started around 3000 BC. You can see the table here:
en.wikipedia.org/wiki/Egyptian_chronology#Overview