It can run a full instance of Minecraft, very poorly with view distance turned way down. And ARM GHz is not directly comparable to amd64 GHz for a bunch of reasons.

RPis aren't the only ARM machines. Oracle gives out Ampere A1 ARM servers with 4 cores and 24 GBs of RAM, free, 24 hours a day, 7 ...

Fair point, since they already have an ARM build, it would be very trivial to port it to ARM Linux.

Here is a desync report

box64 seems to be the easiest way for developers to support Factorio on ARM.

Hello!

I would like to share how I am running a Factorio server on ARM64 and my struggles, so maybe one of you can help me. I am using an Oracle Ampere A1 server, quad-core, 24G RAM.

Benchmarks (Geekbench 5.4.0):
Single-Core Score: 870
Multi-Core Score: 3368

For comparison, here is an i5-7500 ...