The article even says it was "easier" than that - it is a word in a list of known codewords (but slightly off the expected time).

The hard part is not that it's impossible for you to do at home, it's that nobody in 100 years has felt it was worth enough effort to try through enough words until the effort was as simple as prompting the LLM to do the work.

Not every value of AI has to be in the realm of superhuman intelligence, that's just what makes for the most discussion.