According to gemma3:27b

BB(6) halts after 1,071,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,001,071,000,000,000,000,000,000,000,000,000,000...

and it's still spitting out lines of 000s after 5 minutes. Either a hallucination or a pretty good joke.