engracio, you might need to post your k as well.

My trouble-maker is 21181•2^22976900+1

I don't think I can get my exact error values any more, because I restarted prime95 since they occurred and I don't see them in the log. I don't think it's anything to worry about like you said, but I'll probably just cancel the test just in case. It's only at 35%, so I'm not losing that much work. I'd hate myself forever if it turned out to be a bad test that was actually prime :P

EDIT: On second thought - I have an extra machine available, maybe I'll disable reporting & run the test to see what happens.