TheOtherDave comments on Yes, Virginia, You Can Be 99.99% (Or More!) Certain That 53 Is Prime - Less Wrong
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I'm not sure that response works. Flip a fair coin two hundred times, tell me the results, then show me the video and I'll almost certainly believe you. But if the results were H^200, I won't; I'll assume you were wrong or lying about the coin being fair, or something.
H^200 isn't any less likely than any other sequence of two hundred coin flips, but it's still one of the most extraordinary. Extraordinariness just doesn't feel like it's a mere question of prior probability.
Well, what's most interestingly improbable here is the prediction of a 200-coin sequence, not the sequence itself.
I suspect what's going on with such "extraordinary" sequences is a kind of hindsight bias... the sequence seems so simple and easy to understand that, upon revealing it, we feel like "we knew it all along." That is, we feel like we could have predicted it... and since such a prediction is extraordinarily unlikely, we feel like something extraordinarily unlikely just happened.