Most of the really out there Christian fundamentalists, the ones eating the brain of the US political system, are derived from the Protestant Reformation (or Anglican, which is sorta to the side of the Reformation). Even the more fundamentalist Catholics in the US have opinions that align to the Protestants around them rather than the Pope. Big Bang and evolution, for example.
JSON numeric encoding is perfectly capable of precise encoding to arbitrary decimal precision. Strings are easier if you don’t want to fuck around with the parser, though.