What is the time period of the Patriarchs in the Bible?

The Bible does not say when Abraham was born, but estimates based on the biblical genealogies place his birth around 2000 BCE. Abraham supposedly lived to 175, his son Isaac to 180 and then Jacob lived to 147. Abraham had his second son, Isaac, at 100 years old. then Isaac was 60 when Jacob was born, so the three Patriarchs lived over a period of approximately 307 years according to the Bible.