What's the best seed on minecraft to find Herobrine?

Well there isn't a huge chance ull find him… They supposedly took him out, but if you really wanna try finding him just try random seed names.

You do realize he's not real right?

He's not real so he won't appear in your game anytime soon. He was just a rumor and became a success. If you want Herobrine in your game then there are mods that can mimic those rumors.

http://www.minecraftforum.net/...orge-only/" class='ext_link'>http://www.minecraftforum.net/...orge-only/

Seeds aren't what you want. Since Herobrine was removed from the actual game, you can only find him in mods. There are a ton of mods used for Herobrine. It is all based on what type of experience you want with him. I recommend going to the Minecraft Forums for some mods, but this one is a pretty good place to start.
http://www.minecraftforum.net/topic/511421-164-the-herobrine-mod-35-now-with-multiplay-forge-only/

If you need help installing mods on pc, here is a link to a video to help you.

If this is for Xbox, then i'm sorry to tell you that there are no actual "mods", although there are ways to get pc maps or maps others made on xbox. Here is a link to some more info about that if you are interested.

Hope this helps, and good luck with Herobrine.

Herobrine does not exist.