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A general question. Of course Guilliman and the Lion are kicking around 10k years after the crusade. Also the deamon primarchs are obviously still around. Question is simple. Before all the primarchs dissapeared/die how old did the oldest of them get? 300 years ish I think?

And yes I know there’s a lot of “we don’t know”. Like Leman Russ dissapearing in the webway and Vulcan living. Let’s rephrase it to how long from birth untill the last primarch dissapeared pre Imperium age, not counting the deamon primarchs.

I am not totally sure what you are asking, but I think you mean how old was the last loyalist Primarch to go missing/out of action?

That would be Vulkan in the War of the Beast- the others were all gone by then. He would be roughly 1700 by 550M32.

Yeah, that was it. Sorry for the confused phrasing.

No worries.

I should clarify that the age of any long-lived person* in 40k is murky due to warp-travel effects on passage of time, so it is hard to be more precise than ~200 years for the Great Crusade + ~1500 years from the Horus Heresy to the War of the Beast. The Primarch project did start prior to Reunification so I guess there is an unknown amount of extra age to account for the earliest years. Maybe 1800 years is a better estimate for Vulkan's age when he disappeared.

*Well, any that ever travelled in the Warp, especially those who travelled frequently.

Spoilers for Edge of Eternity:


Also, technically Vulkan cheats due to the whole perpetual thing. When you get to come back after being stripped down to your base molecules, age is nothing.

Well I’m curious as to who was the longest active primarch besides Vulcan. Any other primarch active in the war of the beast?

As far as I'm aware, all of the other Imperial Primarchs have either been killed (Ferrus, Sanguinius) or vanished (the rest) by that point.

Ferrus Manus and Sanguinius were killed in the Heresy.
Roboute Guilliman lasted until 121.M31 when he was wounded at the Battle of Thessala by a poisoned blade wielded by Fulgrim. He was then placed in stasis.
Rogal Dorn was active at least until the 3rd Founding in 01.M32 and disappeared boarding a Chaos Battleship. His fate is generally believed to be open-ended however, Konrad Curze foresaw his death multiple times and these visions were never wrong.
Leman Russ left the Space Wolves in 211.M31 and disappeared into the Eye of Terror. There are many believed reasons for this quest with the two most commonly held being that Russ is hunting down Magnus or that he is searching for the mythical Tree of Life with which he will restore the Emperor. Magnus claims to know where Russ is but given that he is Magnus this is just as likely to be a lie as truth.
Corvus Corax disappeared into the Eye of Terror after locking himself in the tower of the Ravenspire. He now hunts the Traitor Primarchs in the Eye of Terror having become a being of darkness and shadow.
Jaghatai Khan disappeared during the Scouring battling the Drukhari who had begun raiding his homeworld of Chogoris. The supposed last sighting of the Khan was him chasing the raiders back into the Webway before it closed behind him.
The Lion disappeared during the Battle of Caliban against the traitor Luther. He was secreted away by the Watchers in the Dark to a hidden chamber at the centre of the Dark Angel's fortress-monastery, the Rock, before resurfacing recently.

 Gert wrote:
Ferrus Manus and Sanguinius were killed in the Heresy.
Roboute Guilliman lasted until 121.M31 when he was wounded at the Battle of Thessala by a poisoned blade wielded by Fulgrim. He was then placed in stasis.
Rogal Dorn was active at least until the 3rd Founding in 01.M32 and disappeared boarding a Chaos Battleship. His fate is generally believed to be open-ended however, Konrad Curze foresaw his death multiple times and these visions were never wrong.
Leman Russ left the Space Wolves in 211.M31 and disappeared into the Eye of Terror. There are many believed reasons for this quest with the two most commonly held being that Russ is hunting down Magnus or that he is searching for the mythical Tree of Life with which he will restore the Emperor. Magnus claims to know where Russ is but given that he is Magnus this is just as likely to be a lie as truth.
Corvus Corax disappeared into the Eye of Terror after locking himself in the tower of the Ravenspire. He now hunts the Traitor Primarchs in the Eye of Terror having become a being of darkness and shadow.
Jaghatai Khan disappeared during the Scouring battling the Drukhari who had begun raiding his homeworld of Chogoris. The supposed last sighting of the Khan was him chasing the raiders back into the Webway before it closed behind him.
The Lion disappeared during the Battle of Caliban against the traitor Luther. He was secreted away by the Watchers in the Dark to a hidden chamber at the centre of the Dark Angel's fortress-monastery, the Rock, before resurfacing recently.

You haven’t put dates for most of these. Do you know if that’s because it’s wide open or are there indications of approximate dates, which century or other events that happened at similar times?
That being said, it seems the oldest after Vulkan when they were last seen was Dorn and he’s have been around 1,200 at the start of M32.

So the Scouring started in 15.M31 just after the Horus Heresy ended. It ends at an unknown point in M31 before the disappearance of Rogal Dorn and the initiation of the 3rd Founding.

The Destruction of Caliban was technically one of the first battles of the Scouring, taking place in 15.M31. The Lion reappeared in whatever GW is calling Current Year Warhammer 40k.

In terms of who is the oldest it goes:
1 - Guilliman/Lion/Corax (All three have had their lives extended through various means be it stasis or Warp time dilation).
2 - Vulkan (disappeared and assumed dead during the War of the Beast).
3 - Dorn (disappeared and assumed dead at some point prior to the War of the Beast but after the Third Founding).
4 - Russ (disappeared 200 years after the Heresy into the Eye of Terror).
5 - The Khan (disappeared during the Scouring, fate unknown).
6 - Sanguinius (Killed at the Siege of Terra)
7 - Ferrus Manus (Killed on Isstvan V).

You missed out Russ.

 Haighus wrote:
You missed out Russ.

they mentioned 211.m31 for russ in the previous post.

So he was active for ~200 years after lion disappeared

Fixed it so it now includes Dog Boy.

Oldest now being the Lion as he wasn’t in stasis that we know or the warp, like Guilliman and Corax.
But time May have moved differently for him potentially I guess.
Though in his book it sounds like it’s just actually been that long.

So if the question is of actual years aging and going by. They love a very long time. More functionally immortal than marines.

But the rest of what Gert has is about it for the others.