No new primes, just another status update:
No sieving was done since the last update.
All n < 5,600,000 have now been checked. No prime since more than 5M candidates, low weight indeed. :)
Since the FFT size grew to 640K with n > 5.6M, the 64 MB L3 cache of the Ryzen 9 3900x ran out when testing 12 numbers simultaneously. Initially I ran six 2threaded LLR instances, but noticed that two of them were about 30% slower than the other four. The reason being the special layout of the processor. There are four socalled CCDs with 16MB L3 cache each. And since each CCD houses three cores, that means that two of the LLR instances ran on two separate CCDs.
So I switched to four 3threaded LLR instances occupying a single CCD each. Maybe special constructs like 4 2threaded and 4 singlethreaded LLRs would lead to a higher throughput, I didn't run any tests.
Smallest LLRtest currently running:
n = 5.62M
FFT = 640K
duration = 4060 s / test
digits = 1.69M
Caldwell entry rank: 241
Largest LLRtest currently running:
n = 5.65M
FFT = 640k
duration = 4090 s / test
digits = 1.70M
Caldwell entry rank: 238
