Longer than that. There is one thread with something like 68,000 posts but I forgot its name.
"...There is one thread with something like 68,000 posts but I forgot its name."
The Hobbit Hole made to the end of the internet twice, at least, and the Undead Thread (This very one, thank you) made it all the way to 65,534 before it morphed into another thread that went well over 30,000 before it began to bog down. Now, we change locales every month, no matter how many posts we have.
Welcome, fintan.
If you've found one in the 68k neighborhood, alert the Management. The post count for each thread is limited to a four-byte "WORD" making the maximum number of posts 65,536 including the article, which I think gets allocated to "Post 0". That means, the highest post number attainable is 65,535 and that limit has been reached at least once, that I'm aware of, by an earlier incarnation of the Undead Thread (that's us).