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A comment on How Big Is YouTube?. Parent comment

Re:How Big Is YouTube? by ad404b8a372f2b9 on Saturday December 23, 2023 @02:03AM (#38742268)
Did you understand where the 2^64 came from in their explanation btw? I would have thought it would be (64^10)*16 according to their description of the string.

Edit: Oh because 64^10 * 16 = (2^6)^10 * (2^4)

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Re:How Big Is YouTube? by dajonker on Saturday December 23, 2023 @04:53AM (#38742980)
The YouTube identifiers are actually 64 bit integers encoded using url-safe base64 encoding. Hence the limited number of possible characters for the 11th position.
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