Someone did some math on the size of the full image, "At 165888 x 79872 pixels, or 1.3 terapixels, the image would fill the screens of 4212 iPads with retina displays in an 81 x 52 grid. The grayscale image is 12.3 gigabytes in size. If it was printed at a size big enough that you could see the people, it would cover a football end zone."
And someone else has created a "map" to help you cheat:
(Thanks for the links jmpava!)