Board Thread:Morrowind/@comment-24399099-20140111121340/@comment-3524435-20150310174125

Well according to both this wiki and UESP, Divayth is about 4000 years old during the events of Morrowind.

I don't remember where the 200-300 average came from, but I do remember encountering it. I would however point out that there are several examples of elves (like Barenziah or Symmachus) who lived well beyond the 300 year mark. My guess is that elves have the potential to live much longer than 300 years. Those that do are surely the exception, but it's not so uncommon that anyone in Tamriel would be shocked to hear about a dunmer living for four centuries or longer. Especially if that dunmer can afford the finest alchemists and healers to tend to them.

Divayth has a lot of power and arcane knowledge. How he's lived so long is probably a mystery to most of Tamriel. Whatever the case is, I find it highly unlikely that Divayth Fyr would die from a heart attack. Unless the Red Year didn't kill him, I'm betting he's alive.