To claim something verified in Lean is wrong, you need to either argue that the theorem was stated incorrectly, or that there is a bug in Lean (assuming no `sorry` etc, which is checked by comparator). The number of lines needed to prove it is irrelevant (other than checking for a bug in Lean gets harder).

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nicce an hour ago | parent [-]

That is the point. Someone must verify that the Lean matches the actual theorem, precisely as it should be interpreted.

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latent-person an hour ago | parent [-]

Which has nothing to do with the total number of lines, it's just the theorem statement you need to check. Here is what they showed, which is under 300 lines with comments https://github.com/openai/NavierStokesAndEuler/blob/main/Com...

	▲	nicce 5 minutes ago \| parent [-]
		That seems to be indeed true. I guess it gets validated quite soon.