Page and Brin originally nicknamed their new search engine "BackRub", because the system checked backlinks to estimate the importance of a site. Eventually, they changed the name to Google, originating from a misspelling of the word "googol", the number one followed by one hundred zeros, which was meant to signify the amount of information the search engine was to handle. Originally, Google ran under the Stanford University website, with the domain google.stanford.edu. The domain google.com was registered on September 15, 1997, and the company was incorporated on September 4, 1998, at a friend's garage in Menlo Park, California.