How are game numbers assigned?

[MorganHite]

Just curious... I've noticed that the game number I receive increases quite fast, by perhaps 800 an hour.

Are this many games of Dominion actually being played, or are game numbers assigned by a timestamp? I'm just wondering about the mechanism here.

[Ingix]

They are assigned consecutively, so 800 games an hour doesn't sound off, consideruing there are many players.