According to the latest official data, the primary surplus of the state budget in the first six months of 2014 (January to June) has been estimated to be 712 million euros.
During the same six-month period in 2013, there was a primary deficit of 1.5 billion euros.
The full report with detailed divs, as presented by the Deputy Minister of Finances Christos Staikouras, is available here (in Greek).