Which are the google algorithms?

What are the algorithms that other search engines like Bing follow apart from PageRank by Google?

• PageRank(Skeleton of google search) is a google patent and hence no other search engine can use this algorithm to rank their webpages. So ,what algorithms they use ???

• Answer:

  A competitive, web-scale search engines has hundreds of algorithms in it, for crawling, ranking and indexing, and answering queries. If you're mainly interested in ranking algorithms, you should know that the main factor that determines if a page ranks well for a given word is the anchortext (https://en.wikipedia.org/wiki/Anchor_text) and value of incoming links. This is related to PageRank, which can be what you use to determine the value of incoming links. If you're interested in other kinds of algorithms, please add question details.