Millennium: A Rough Chronology

Is there a secrete in millenniums? I have created a rough chronology of messengers of God. Dates are not certain for humans. Already I discussed briefly if the time has a significance for God. I discuss further, but later. Adam came to earth six thousand years ago. After six hundred years came Noah. It was five thousand four hundred years ago. After one thousand four hundred years came Abraham. It was four millennium ago, and two millennium after Adam. After six hundred years came Moses. Almost three thousand four hundred years ago and two millennium after Noah. Then after one thousand four hundred years Jesus Christ came to earth. It was two millennium after Abraham. Six hundred years after him Mohammad came among people. It was two millennium after Moses. Now it is one thousand four hundred years after Mohammad and two millennium after Jesus Christ.