I am going through a course that includes an introduction to programing language and one thing I had to learn was to convert numbers from decimal our normal metric system to binary code, to octal, to hexadecimal. and they are all a way of keeping track but they do not convert evenly at all base 10 base 2,8, and 16.
Terrific! I'm a hobbyist programmer as well. Yeah, we use a base 10 system today, the Babylonians used base 60, and the Hebrews apparently used a kind of base 10 system with other characters for 10s and 100s.
So what if possibly some scribe somewhere along the way just didn't convert his numbers correctly, when he was translating these fables.
Dunno. For sure, there were previous characters and actual kings who were attributed or had attributed to themselves very long lives. There certainly are entire doctrines built around scribal errors.
My contention is that to attempt to calculate "the real lifetimes" from those listed in Genesis is to mistake these characters for historical people. That goes for dividing them by 10 or 12 as well. Human beings are not 6000 years old or borne of a golem spell, and Genesis is myth rather than history.