The Oldest Tree in the World?

I love going to north america. I would really enjoy visiting that part of the us. And there's more, because it's part of the sierra nevada mountain range. Lots of high mountains in that area. There's a park quite close, fairly close to yosemite, called the sequoi national park. In that park there's the oldest tree in the world,. It's called the general sherman tree. Have a guess, reza, how old do you think the oldest Tree in the world could be?