Polyphony has announced that Gran Turismo 5 has sold 6.37 million copies in the first six weeks of going on sale.

In the chart below from the developer, you can see that the game has already outsold both GT 5 Prologue and the PSP version of the game.

– ARTICLE CONTINUES BELOW –

As expected, most of the sales have come from Europe, where the game has sold 3.97 million, against 1.58 million in the US and 600K in Japan.

Impressive.

Source: Polyphony, via NeoGAF.