Research firm ComScore claims Google is the first to receive over one billion unique visitors in a single month.

One billion people worldwide visited Google in May, the first time ever that a site has drawn that many visitors in one month, according to data from ComScore.

The number of unique visitors to Google's sites rose by 8.4 percent from 931 million a year ago to just over a billion--1,009,699,000 to be more exact.

Across the world, market researcher ComScore said yesterday, Google saw its greatest numbers in India and South Africa, which accounted for 14.3 percent and 13.5 percent of its visitors, respectively. The lowest numbers were in South Korea and China, which accounted for 0.7 percent and 0.8 percent of total worldwide visitors, respectively.