20484 after about two hours. A few close calls and at times I felt like I was playing Tower of Hanoi leveling up areas. Only pushed up twice. Final part was fa

20484 after about two hours. A few close calls and at times I felt like I was playing Tower of Hanoi leveling up areas. Only pushed up twice. Final part was fast as all you need is two 128 blocks, one 256, a 512 and the 1024.