We have now updated our Historic Index with data for start of June 2013. Here are the new stats:
Historic Index –
Unique Pages crawled: 501,925,972,687
Unique URLs: 2,008,056,406,541
Date range: 07 Nov 2007 to 09 Jun 2013
There is an increase in unique crawled pages but reduction of unique URLs due to roll out of quality improvement algorithm used initially in Fresh index.
– See more at: http://blog.majesticseo.com/index-updates/historic-index-update-17/