Here, I really want an answer, but I don't want to make a thread. If you answer this question, and I tell anyone about it, I'll be sure to mention you.
If you have all 3 f2l pairs + cross completed, and a pair (plus an extra corner) right above it's slot, how many combinations of the other corners are there? This includes permutation and orientation, and it would be extremely nice if you told me the mirrors, too. Remember, there is a corner half solved (only R'/L away from solved, with the empty slot facing you) and an f2l pair connected to it, and I don't care about edges. Even if you don't know the exact answer, an accurate guess would be great.
Once again, you would be a great help, and you could get an honorable mention.
EDIT: an example is the scramble D2 R2 B2 U' B2 D2 L2 F2 L2 B2 D' R2 U2 F2 U' L' B2 R D2 U2 R, where you can see the f2l + corner block.