InfiniteMath is a module that allows you to surpass the double-precision floating-point number limit of 10^308.
Here's the installation page, an in-depth explanation of the module, and API documentation.
Here's the DevForum post of the module. If you use InfiniteMath in your game, send it to me on Discord Kdude#1774 or reply to the post with your game and I'll add it to the DevForum post!
Here is an uncopylocked game that uses InfiniteMath. It's a simple idle game but it gets the point across, and here is a video showing off that game.