[LegionMammal978]

Nice article! I've also rolled some of my own bigint code recently (for earlier versions of [0]), and I can recall how frustrating it was to translate high-level descriptions in math papers into actual operations.

I do have a small quibble, though:

> At this point, the BigInt is using base-(2^64-1) or base-18446744073709551615 and it only needs 16 "digits" to represent a number that uses 309 digits in base-10!

If you use the full range of a u64, then your number will be in base 2^64, with each word ranging from 0 to 2^64-1, in the same way that base-10 digits range from 0 to 9.

[0] https://github.com/LegionMammal978/bigfoot-sim