I'm showing 588 days.
Blah, I've only got 323 days logged in. The thing is, I have my computer running basically 24/7 with bitcointalk always up in one of my tabs--and I tend to check new threads and so forth constantly throughout the day. I know I haven't actually spent that much time browsing or writing.
I always tend to close my tabs, so it makes sense that I "only" have been logged in for 68 days, while I've registered in 2013.
No chance of ever catching up