Quote:
Originally Posted by kriesel
P1 factors found at a GCD early in stage 2 are reported as if they were found in stage 1, with only stage 1 bound given, omitting whatever the effective stage 2 bound was. (Gpuowl v7.x also does this.) This may be considered featureabsence rather than bug.

Due to the way the primes are paired, some of the smallest stage 2 primes are paired with some of the largest. So, at no point (until the very end), there might be a bound such that all smaller primes have been handled in stage 2.