What's the deal with 9-digit numeral-only filenames? I've

Could you link an example?

in thread >>1477847 201259321.jpg
in thread >>1479519 152902358.jpg
in thread >>1475494 126230079.jpg
in thread >>1473963 201259321.jpg
in thread >>1475307 201259321.jpg

>>1479569
Did you do that automatically or manually? Either way, thanks.
This filename is much, much worse and I can't figure out where it comes from, either: https://desuarchive.org/_/search/boards/a.aco.an.c.co.d.fit.gif.his.int.k.m.mlp.q.qa.r9k.tg.trash.vr.wsg/filename/flat%2C800x800%2C070%2Cf.jpg/
>flat,800x800,070,f.jpg
Seriously look at that in any archive for any board. I'm thinking of adding it to filename filter because I've yet to see any exceptions to it.

>>1479571
That filename seems to be posted from one poster. But 9-digit numeral-only filenames is probably board-specific.

in thread >>>/a/160290754 312314134.gif
in thread >>>/a/160279084 136169169.jpg
in thread >>>/a/160287062 234785639.jpg
in thread >>>/a/160264134 105891195.jpg
in thread >>>/a/160250062 321312312.jpg
in thread >>>/a/160282550 726457427.png
in thread >>>/a/160292928 728327378.jpg
in thread >>>/a/160287179 000000000.png
in thread >>>/a/160264589 404131295.jpg
in thread >>>/a/160270682 160272411.png
in thread >>>/a/160270682 160298637.png
in thread >>>/a/160285453 289389438.jpg
in thread >>>/a/160256872 148513591.jpg
in thread >>>/a/160277777 147075806.png
in thread >>>/a/160277777 142011085.png
in thread >>>/a/160269754 739055824.jpg

>>1479575
While possible, that seems pretty unlikely to me. archived.moe shows 2884 results for the filename and that would be a very odd choice for something done manually.

Perhaps it's the work of a filename randomizer? Those have become popular lately.

>>1480341
The 4chan X randomizer imitates 4chan's timestamp-based filenames. There could be some other program that does it differently, but pretty much any other choice other than perhaps imitating phone filenames would stick out too much, making it somewhat counterproductive for anonymity.

>>1479558