I suppose you didn't get any reply from McDuck.
Anyway, let me praise your position of waiting for the end of the drive to start the double checking.:bow:

Any plans to take this drive above n = >1e6

Beyond-
Not in the near future; we have plenty of megabit work to do in k<300. I assume that once we approach 1.3M or so on all the k's under 300, we will resume operations like this.

Taking 1000-1005.

Taking 1005-1010.

Taking 1010-1020.

1010-1020 complete (3 primes).

1000-1010 complete, no primes.
Taking 1020-1022.

Taking 1022-1030.

1022-1030 complete, no primes.

Taking 1030-1036.