If the difficulty went that high without much higher prices first the price of bitcoin would go to $0. Because the only way that much computing power would be set to mining at current prices is if the owner of the computing power wanted to kill bitcoin. With enough computing power to drive difficulty that high they would succeed.
That was just an example figure, meant to show 'an increase in difficulty'. I could have chosen 877221.666667 (1 more than the current difficulty), but my example would have lacked impact, while still retaining it's point.