What do you mean by "of this scope"? The winning solution was produced by students and interns who coordinated over the Internet, in less than a year. The probl

What do you mean by "of this scope"? The winning solution was produced by students and interns who coordinated over the Internet, in less than a year. The problem isn't scope, the problem is attracting lots of bright individuals to work on such a task (for free). And offering a substantial monetary incentive to the winner is probably the best way to do that. And yes, $1 million is very substantial for an individual. And the cool thing about offering it as a prize (from the point of view of the organizers, that is) is they only have to pay one person or team, although potentially thousands ultimately contribute to the solution, directly or indirectly.