Google has said time and time again that they have over 200 ranking signals within their search ranking algorithm. But have you ever tried to document them all?

So we have places like Moz who released their ranking studies, as well as other places like SearchMetrics and others. But this one guy, by himself, documented 261 ranking factors he thinks Google uses in their search algorithm.

You can see them all detailed and explained at this page.

He used three methods to document these factors:

Patent filings
Direct statements from Google and/or their team
Applying The Scientific Method

There is even a slider to filter out the most concrete factors to hiding what some may call SEO myths.

Have fun reading through all of them over here.

Forum discussion at Google+.