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So the computer that simulates the universe is likely a 512-bit machine.

How does it simulate subatomic particles then?

It doesn't seem there are many orders of magnitude more subatomic particles. 3 quarks in a proton. At most O(10^2) protons in a atom. So it should all fit comfortably in a 512-bit type.

* As for photons, this estimate finds 4*10^84 photons since start of universe:

https://cosmosmagazine.com/science/physics/how-many-photons-...

“3 quarks in a proton” is an oversimplification; the reality involves “zillions” of particles, as per https://profmattstrassler.com/articles-and-posts/largehadron...

Maybe we need to use 1024-bit types?

The universe is expanding, we need it to be scalable

It’s virtual memory and it has a TLB.

Reply on news.ycombinator.com