5th largest (depending on what we're measuring size of): https://www.top500.org/lists/top500/list/2021/11/ https://www.top500.org/lists/top500/list/2021/11/ Wh

5th largest (depending on what we're measuring size of): https://www.top500.org/lists/top500/list/2021/11/ https://www.top500.org/lists/top500/list/2021/11/ Which is still of course incredibly impressive, but I wouldn't say biggest, maybe 'one of the biggest' is fair. Even that's constrained by 'known' -- some private companies especially in fossil fuel and tech companies have systems larger either dedicated or allocatable. You can also do black hole simulations (orbit and merger) on far smaller systems. I worked with a physicist who did these numeric relativity sims on smaller systems, you simply lose fidelity (also depends on how you treat the singularity). Our visualizations looked like cartoons compared to these beautiful renderings though.