@Rusp:
d7! = (6) = 6
d7! = (6) = 6d6! = (4) = 4d4! = (4+2) = 6d6! = (6+4) = 10d10! = (9) = 9d9! = (4) = 4d4! = (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) = 5