User blog comment:Kogath/Monster Hunter: World Discussion/@comment-24734669-20190511041552/@comment-24734669-20190511152349

@Drake 512

It has 3.69 (so 3.7) times as much HP as regular Nergigante. Its attack modifier is also 800%; it boasts the highest attack strength in the game, tied with the Greatest Jagras.

I can see why you'd have a really hard time with this fight.