I love checking back on the list of longest-lived hoaxes on Wikipedia, because they keep digging this stuff up. The new record-holder was alive on Wikipedia for 19.29 years and only got found in February.
How deep does this go
Wikipedia:List of hoaxes on Wikipedia
A false entry was inserted, claiming that a false claim had been made that Palladium is used in the manufacture of Thiotimoline. Hoax was initially removed on October 8, 2020, but was added back twenty minutes later.

































