Web project to solve problems, can't rememeber the name

[lalbatros]

I could not remember how it was called.
This was a project on the web intended to solve problems in big teams.
Everybody could contribute with his own skills.
I remember that a theorem was proved in this way and published under the name of this project.

Do you remember the name of this project?

Thanks,

Michel

 

[Bill Simpson]

Perhaps it was this?

http://www.sciencenews.org/view/generic/id/50532/title/Math_Trek__Mathematics_by_collaboration

http://en.wikipedia.org/wiki/Timothy_Gowers