My PII 400 w. 64Mb RAM took 5.5 days, however I think it should have been quicker: I use a KVM switch to switch between my WinXP machine and the Linux box (at uni) and it appears that the double tap on scroll-lock (which is needed to change between the machines) was pausing the console on the Linux box - and therefore it didn't run until I switched back.
Possibly (I've not run exhaustive tests ;-) worth bearing in mind.
Si