This week its been unofficially reported by statistician Paul Allen that Google+ may now have passed the 43 million user mark. Allen the founder of the Ancestry.com uses a unique method of estimating the number of users currently within the Google+ ranks by using uncommon user names.

In the past Allen’s predictions have proved very accurate, and he reports there were approximately 37.8 million users on Google+ as of this morning, up from 28.7 13 days ago.

Allen has upped his estimates to 43 million to account for non-Roman surnames, as well as private user profiles, both of which are overlooked by his surname counting model. Here is a quick list of previous estimates by Allen:

• July 4th – 1.7 million users
• July 9th – 4.5 million users
• July 12 – 10 million users
• September 9th – 28.7 million users
• September 22nd – 43.4 million users

I wonder how long it will take Google+ to mass enough users to start concerning Facebook, who has around 800 million users?

Source: TNW : Paul Allen : PlusHeadlines