Yes, this is officially the oldest game still active.
It was created by lupin3rd on may, the 11th, 2003.
Last move before the automove started was made by cthulhu on June, 26th, 2003.

This is a real archelogical item, since the first ever Blue Max game played, number 301, was created only 13 days before this one.

Other very old games still active are: 454, 503, 530, 531, 590, 615, 617, 619, 667, 670.

Nick.