at 1 bilion keys/s all range 4000000000000000000 to 500000000000000000 takes 12 years to scan

it takes 24 years to scan if it is up to 5ffffffffffffffffff
I think you mean 9359 years. Unless of course the non-n00bz manage to break the hardware limitations via a combination of ideas and proper techniques (the 27th time's the charm) and crack open the lame mathematical limitations of the last 30 years..Or is it maybe of the last 5000 years? Or maybe since forever, and forever?