Board Thread:Support Requests - Getting Technical/@comment-24258073-20180524062251/@comment-24155515-20180604154810

That's the one I ran my check on (and produced the linked list from) in my message a day ago, so as of May 30, you would have had to categorize 4398 images to get Special:UncategorizedFiles to less than 1000 (specifically to 999 but...). Might actually be a bit lower since I noticed that I missed a template (possibly more than one) looking at the images that have been added in the past five days (since the dump) just now. (I'll run it again to get an updated number, because I don't see any reason why not. I presume the 6677 figure (or 5678 images you need to cat) is accurate if you want to ignore cats added by templates.)

Out of the images not included in the dump (everything newer than File:Doctor Nitrus Brio - Crash 1.png in Special:Images), approximately 7 out of 15 were not categorized, by my manual count.