March 31st, 2025

AI/Math Puzzle

Mark encountered a math puzzle in San Francisco involving complex concepts. Despite his struggles, he couldn't solve it. User comments clarified aspects, revealing the final answer as "exa," an SI prefix.

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AI/Math Puzzle

Mark shares his experience with a math puzzle he encountered on a poster in San Francisco, which leads to a reward website. The puzzle features a complex formula involving mathematical concepts such as argmax, softmax, and BusyBeaver, and it invites solvers to find a prize. Despite his efforts to break down the components of the puzzle, Mark struggles to arrive at a solution. He discusses various interpretations of the mathematical terms and their implications, including the potential values for BusyBeaver(4) and the meaning of the prefix function. Ultimately, he concludes that he is unable to solve the puzzle and considers alternative methods to find the answer, such as checking recently registered domain names. In the comments, other users provide insights that help clarify some of Mark's misunderstandings, particularly regarding the definitions of log* and BusyBeaver(4). The final answer to the puzzle is revealed to be "exa," which relates to the SI prefix for large numbers.

- Mark found a math puzzle on a poster in San Francisco that leads to a reward website.

- He struggled to solve the puzzle, which involved complex mathematical concepts.

- Despite his efforts, he could not arrive at a definitive answer.

- Comments from other users helped clarify some of the puzzle's components.

- The final answer to the puzzle is "exa," related to SI prefixes.

Link Icon 8 comments
By @esomod - 1 day
By @NooneAtAll3 - 1 day
log* is https://en.wikipedia.org/wiki/Iterated_logarithm

aka inverse of tetration

By @munchler - 1 day
It's an ad for a search engine.
By @timerol - 1 day
I solved this in the worst way. Took a (correct) guess at what was meant by prefix, and then brute-forced a dozen of them. Did you know that zetta.ai is also an AI company?
By @guy234 - 1 day
this problem does not look remotely interesting
By @albert_e - 1 day
Haven't read past the problem statement to avoid spoilers.

How difficult can it be to brute force this. (Try all possible domain names within a reasonable length)

Take help from AI while you are at it.

By @tasoeur - 1 day
exa.ai/givemeprize