How old do you guys think the FSM was when he died?

I was discussing this with my friends and they believe he was around 10k when he died and I believed he would have to have been much older. Also how old do you think he was when Wu and Garmadon were born? My friends believe that they were born a but after ninjago ( the land ) was created but I think there would of been a massive jump between niniago ( the land ) being created and Wu and Garmadon being born as the FSM has many stories of him going to different realms and I just cant see him...