You can use Wikipedia to find sources, but this definition in particular is just wrong. Cantor himself proved that such a "number" could not exist.
From this comment, and the sources you used, it seems like, barring an extreme coincidence, you probably made
this edit to the Absolute Infinite page on Wikipedia.
We haven't really had this situation come up before, so I'd like to clarify the apparent staff view on this sort of thing, for all watching the thread.
Since you had good reason to make that edit (the previous claim was uncited, and your counterargument is cited), it's mostly fine, but it does kind of suck that you didn't clearly tell people in the thread that you were making that change. Since this was a piece of evidence other people were pointing to, it ended up changing the evidence they presented without their knowledge, which isn't a great situation.
So if you, or anyone else, wants to edit information on another website that's being used as part of an argument here, please make sure it's being done for good reason, in line with the other site's standards, and that we're told about it to reduce confusion.
If you wanna ask me about this further, Telomera, feel free to DM me.