The b limit with the x87 transform is 64M. That's far short of 136G needed to be near the bottom of the Top 5000 list.
I'm wondering if there's any point to continuing this project on PRPNet, other than collecting long lists of smaller primes. It has been established at this thread that results from lower N like 32768 will not be used to filter work units of higher N on PRPNet.
Is there a commitment to finish work that PRPNet has reserved? How much work is left in the reservation?
GFN32768 would be a nice shorter task for CPU-only BOINCers to attain credit toward GFN badges, but it goes against the spirit of PrimeGrid, which runs non-conjecture projects that place in Top 5000. That said, there are a lot of people that take pride in their badges, who lack patience or CPU speed for longer-deadline CPU tasks.