64 bits are more than adequate to the task of representing the decimal number 15 billion. They more than amply represent that number. I note that bits is capitalized on the referenced page. 64 Bits is 8 Bytes. Four such numbers are required to locate a point, and three points are required to describe a simple standard surface. 100 Bytes will amply describe a simple standard surface anywhere in a universe the size of our visible universe. They will describe such a surface with considerable precision. I can't say for sure, but it seems likely that one Kilobyte would describe a surface with the kind of precision I described earlier, that is, any size surface, from one the size of the universe to one the size of possibly the smallest know things in the universe. A one Terabyte file would be sufficient to describe 1 billion such surfaces, which is, at least in a small way, a satisfactory version of infinity.
Various reasons will be proffered to argue that infinite CAD is impractical, or too difficult to achieve for popular use. File size relative to available storage technology won't, however, hold up.
