Not counting DNFs, of course; this is from the end of last year - I really need to download the latest export. But here it is as of end of last year:
3x3x3: 15:08.00 Isabella Petri (2010PETR02), SESC Santos 2010
2x2x2: 11:24.00 Jimeng Guo (郭冀蒙) (2016GUOJ02), Tangshan Open 2017
Query I used:
select competitionId, personId, personName, greatest(value1, value2, value3, value4, value5) from Results where eventId = '333' order by greatest(value1, value2, value3, value4, value5) desc;
For 3x3x3, my wife has 3 of the top 1000 worst singles, and for 2x2x2, my youngest daughter has one of the top 100 worst singles.