[Question] Does value of '__primitive_extension_fingerprint' have special meaning?

I'm making 'float' primitive extension.

The problem is that:
      I want to implement it by using integerArray so that we can calculate easily.
      But I can't use integerArray as 'fingerprint' uses some alphabets.
      I want to change the base `__primitive_extension_declaration` using only numbers.

If it is a problem, I'll use 'array' instead of 'integerarray'.