Stage2 is needed to find factors. In your mprime directory, look for a bunch of files called (one letter)(long number), I hope you get what I mean. it could be something like
z5123875 or
f1329834
if they are there, you probably can just put in the stuff for worktodo.txt again, change your memory settings, and it will start to do all the stage2 for the tests. If that fails, it is proably better to drop that range and to do another one with larger memory settings, rather than redoing all the stage 1 work.
H.