Funny you should say this. As I was pasting this link, I thought to myself: "This is a nice memorable number... I should just memorize this URL. It's not as if it will never come in handy again."
I'm worse, I never really noticed what number it is but when I see an xkcd link like that I infer from the context that it must be that particular one, without even considering it might be another, and then I verify and I'm right 100% of the time.
