Binary list to decimal string block

I know many people have answered this question before, but I have a couple limitations.

I want to use this for a project that works with unfathomably large integer numbers (basically BigInts) but without using javascript or the BigNums library.

I need to convert a binary list of booleans (least significant digit first) into a decimal string, while not lazily converting them into a number.

the block to do the conversion

the block returning the integer type

sorry, I don’t know what you mean.

For that, you’ll basically need a base-10 bignum. Addition is all you need though.

How “unfathomably large” are these integers?