Re: few days?
Kinda surprised nobody's pointed this out : Moore's Law posits a _doubling_ of computing power every 18 months. You've got it as a _quadrupling_; it's 2^25, not 4^25. You also have it as 25 quadruplings times nothing in particular, rather than 25 quadruplings starting from four days.
So we really ought to be thinking that 40 years ago, it would have taken about 4(2^25) days to crack this password, or about 370,000 years. Still a long time, I grant you. But not 200,000 times the age of the universe.