Isn't it obvious? He aligned some decimal keys so they look nice to read, than picked some lottery numbers on some random columns of digits, skipping a few numbers here and there so that he can end up with some sums he really wanted to get to. Because yeah, it makes complete sense to randomly pick some numbers and not others. Oh, and yeah, also needed a "third digit" but only for some rows, so the math all works out 100% error-free. Astonishing. Now he wants to know why that "happened".

Next step is escaping from the matrix - maybe via a Bingo arrangement or some Rubik cube. I bet a 4-dimensional 24-cell can also reveal the private keys.