How many centuries ago a single Egyptian state was formed?

A single Egyptian state was formed for 50 centuries. It became united due to the fact that the pharaoh from southern Egypt seized power in northern Egypt. The divided states turned into a single whole after another conflict. In it, they showed themselves as brave military leaders. The unification has brought many positive results. Territories expanded, and with it the strength of the country increased. The state with the capital in Memphis began to develop the economy and conquer new territories.