@Rusp:
d4! = (2) = 2
d4! = (2) = 2d2! = (2+1) = 3d3! = (2) = 2d2! = (2+1) = 3d3! = (2) = 2d2! = (1) = 1d777 = (589) = 589d777 = (687) = 687d7777 = (6345) = 6345d777 = (67) = 67d7777 = (2353) = 2353d7! = (5) = 5d7777 = (154) = 154d777 = (348) = 348d7777 = (1212) = 1212d7! = (5) = 5