That's the number of one of several patents filed in the US recently by the Californian internet giant. According to that patent, Google is for the first time planning to rank news stories according to their accuracy and reliability as well as their topicality.

Google, and its heavyweight competitors, are pouring billions of dollars and thousands of staff hours into trying to ensure that when you search on the internet, you receive not only exactly the information you want, but also information that is true.

During the early days of the internet boom, it was predicted that search engines would gradually lessen in importance as users latched on to their favourite sites. But the opposite has proved true, with Google and its competitors becoming the way into the web for eight in 10 web users, according to Ask Jeeves.

Google News, an offshoot that emerged directly from the company's policy of allowing its 2,700 staff to spend a fifth of their time on their own projects, links to 4,500 sources from around the world and has become a key source of traffic for the internet arms of traditional media giants. But it makes no claim for the sources' veracity or accuracy.

Now Google is looking to develop technologies that factor in the amount of important coverage produced by a source, the amount of traffic it attracts, circulation statistics, staff size, breadth of coverage and number of global operations.

A Google spokeswoman said the company did not discuss individual patents but pointed out that its news service was "evolving all the time".

But Jim Hedger, the search engine optimisation manager of Canadian company Stepforth, says that "Google is in the midst of sweeping changes to the way it operates". After the posting of the patents, he wrote: "It isn't really a search engine in the fine sense of the word anymore ... It is more of an institution, the ultimate public-private partnership."

The company, famously founded in a garage by students Larry Page and Sergey Brin just seven years ago and now valued at over $80bn (£43.8bn), recently revealed that it will pour $500m into developing new technologies this year alone.

It's not just Google that is pouring cash into discovering the internet's equivalent of the Holy Grail. Competitors Microsoft, Yahoo! and Ask Jeeves are also spending huge sums to employ armies of developers working around the clock to develop new versions of the complex algorithms that power search engines.

Charlene Li, a technology analyst from Forrester Research, said in a recent report that the search engine market was in a huge period of development and change. "As MSN launches its new search engine and players like Yahoo!, Ask Jeeves, A9 and a slew of startups continue to innovate, ... the market remains open to big shifts," she said.

Tony Macklin, vice president of European product development at Ask Jeeves, added that the difference between competitors was now "more about brand than technology".

Google is notoriously secretive about its algorithms - the online equivalent of the recipe for Coca Cola.

The company insists its only motive is to help users make sense of the morass of information on the web. But some worry about the cultural influence of everything being filtered through the Google lens, particularly if it emerges as the arbiter of "truth" on the web.

In France, Google's plans to digitise 15m books from Harvard, Stanford, Oxford and the New York Public Library immediately raised the kind of ire once directed at the perceived cultural imperialism of Disney. The head of the French National Library, Jean-Noel Jeanneney, writing in Le Monde, called the plans "confirmation of the risk of crushing American domination in the way future generations conceive the world".

But experts in search technology say that such objectors are shutting the stable door long after the horse has bolted. "The technology already makes quality judgments on things all the time - that's the nature of a search engine. No matter what they do, they'll always come in for criticism," contended Danny Sullivan, editor of Search Engine Watch.

Mr Macklin said the Ask Jeeves technology already contained a bias towards more authoritative sites for its results.

Mr Sullivan said another dimension would be added to the debate once search technology started second guessing users' preferences by analysing their online activity and even their hard drives. Microsoft is planning to put tools based around a concept known as "implicit query" in its next version of Windows, due to be launched next year.

"It will be interesting to see when they make that further jump into modifying the results based on your behaviour. People don't think about the fact they have a search profile, but they do," said Mr Sullivan. "You'll do the same search and suddenly realise it's different to your friend's because you've got different histories. It will be a problem for some people. But if it's useful, people will believe in it and use it."

As religious leaders will attest, belief in your version of the truth largely depends on faith. Google's company motto remains "don't be evil". How long before that becomes "the way, the truth and the life"?