How Long did it take Pixar to render the movie "Up"?

If you got sources that can answer my question, that would be great!
Update: i mean website sources
Update 2: talking about rendering, not the whole production process. It took four days for Pixar to RENDER "Finding Nemo" how long did it take to RENDER "Up" if you know any websites regarding my questions, that would be cool if you can tell me it.
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