Quick js floating point scale question

Would it be too ambitious to ask for a straight 2^36 item (cubic) data structure?

Worst case in practice would be half that, really bad case a quarter, not great case a 64th, best worst case is in the low billions of references. Asking for a friend.

4096^3 Same question.

64^3 is obviously more reasonable

Is that like 8gb least best case?

8mb maybe

Probably should keep in the kb range