Four thousand three hundred years — Sargon the Great

Around 2270 BC (4300 years ago), Sargon of Akkad created history's first empire, uniting Sumer and Akkad. The first ruler to hold power over all of Mesopotamia.

4300 = 43×100. 43 is prime; the 41st element niobium — vital for superconductors and jet engines — bears a related number.

4+3+0+0=7. Two trailing zeros amplify the silence of seven. The number knows more than it says.