Top Producers Report question

[petrw1]

I am looking at the Top 500 lifetime TF and there are 2,337 lines with GhzDays >0 yet 0 Attempts and 0 Successes.

How can that be?

And on the other hand some people with 0 GhzDays and yet >0 attempts the most of extreme of which is:
7378 J Feitsma 0 31580 31580
with 0 GhzDays and 31,580 Attempts and Successes

[mdettweiler]

Originally Posted by petrw1

I am looking at the Top 500 lifetime TF and there are 2,337 lines with GhzDays >0 yet 0 Attempts and 0 Successes.

How can that be?

And on the other hand some people with 0 GhzDays and yet >0 attempts the most of extreme of which is:
7378 J Feitsma 0 31580 31580
with 0 GhzDays and 31,580 Attempts and Successes

Perhaps it's all v4 credit, and they haven't actually done any v5 workunits? (As I understand it, this is what one would expect if the person went and claimed the credits from ANONYMOUS by registering in v5, but then didn't actually submit any new results from then on.)

[J.F.]

I am the Feitsma guy. Funny how a bit of self-googling can bring you somewhere :).

When I was doing the base2-psp search, the main work involved a lot of trial-factoring on small mersenne primes. I simply submitted all those factors to the proper databases, which can look a bit strange indeed.