For where we are right now, we're oversieved. In the time it takes to remove a candidate by CPU sieving, one can test 3.27 factorial candidates or 1.64 primorial candidates. By definition, when it takes longer to sieve than to test, it's time to stop sieving.
On Dual E5-2620 (running 12 threads), times are per 1 thread:
fpsieve - 1factor/24hrs
pfgw64 - 1test/20hrs