I added the current amount you will get paid to top 10 list if solution is found. Takes into account the real time value of bitcoin.
http://www.ttdsales.com/64bit/i think(thats only mu thought and decisions), that bitcrack is rather stupid, because you don't know where and what are you doing.. in fact you all time bit a rock...but it's only my thought, what you gone do in range 12873562336973246598716213543 - 48975348027768076943679-84769847698 ?
I think bitcrack is not a tool for all time work, bytheway while you checking 1mlrd addresses you can loose another one with balance