Answer: Google

In the Summer of 2004, a billboard appeared on Highway 101 in Silicon Valley. The simple white billboard with black text read: {first 10-digit prime found in consecutive digits e}.com–the answer to the problem is Euler’s number and would lead the curious to (now defunct) 7427466391.com.

There they would be faced with yet another complex mathematical problem whose answer would in turn lead them to Google Labs where they could submit their resume to work at Google.