I've done slightly longer.
I made a wikipedia page about a friend of mine. Hella lying, saying he was in all kinds of shit. I made up characters on TV shows and said he was the actor for them. No one noticed. Then I started pushing it to see how far I could take it. I had his birthdate as 1982, and said he was a stunt man for some 80s movie. Couple days later it was deleted as an obvious hoax. Had I not pushed it, I don't know how long it would have lasted.