@RexRed,
When we look at the biblical evidence for the lifespans of all three Hebrew patriarchs, Abraham, Isaac and Jacob, we see that:
1. Abraham lived to 175 (5 X 5 X 7) Isaac lived to 180 (6 X 6 X 5) Jacob lived to 147 (7 X 7 X 3) An analysis of these ages shows:
Each lifespan involves a perfect square (5, 6, then 7 in a numeric series),
the third factor also forms a series (7, 5, 3)
and in each case the sum of the factors is 17.
5+5+7=17
6+6+5=17
7+7+3=17