This is amazing! I love seeing FRACTRAN-shaped things on the homepage :) This reminds me of how 1-bit stacks are encoded in binary:

A stack of zeros and ones can be encoded in a single number by keeping with bit-shifting and incrementing.

    Pushing a 0 onto the stack is equivalent to doubling the number.
    Pushing a 1 is equivalent to doubling and adding 1.
    Popping is equivalent to dividing by 2, where the remainder is the number.

Rejoice is a concatenative programming language in which data is encoded as multisets that compose by multiplication. Think Fractran, without the rule-searching, or Forth without a stack.

https://wiki.xxiivv.com/site/rejoice