8 days, 9 hours and 9 minutes.

Looks like mine is the highest so far out of all the recent posts in this thread.

Not really; this isn't the time since you registered an account here, but the time you've spent active in the forum. Still, last I checked, the highest logged in time was at about 800 days for a forum member.

EDIT: just checked: satoshi is at 9 days. (https://bitcointalk.org/index.php?action=profile;u=3;sa=statPanel)

Actively posting or reading threads while logged in, yes, I guess you've been here almost as long as him. But you can also visit the forum and read up on what is going on while logged out, and only login for posting, PMs, and such. Alternatively, he could have simply created another account and used that for most forum related stuff.

Total time logged in: 1 days, 12 hours and 21 minutes.   

1hour10mins

I`m at only 2  days..

8 days, 11 hours and 12 minutes.

12 hrs and 11 mins.. 

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Total time logged in: 1 days, 1 hours and 11 minutes.