To respond to an earlier message, I believe that if we have a 10% error rate, approx 10% of the numbers will need to be triple checked. And approx 1% will need to be quadruple checked. An error is only determined with a different result on the second pass, requiring all these error results to be redone a third time. Of all the redone error results, 10% will have yet another error result on the third pass (ie. it will not match the second or first pass), and requiring a forth pass on these etc. [there are also some other cases that also must be considered]

My question that I have for the forum experts is how much will this prime speed up the progress on the remaining 6 numbers. Can one assume it will speed them up by 1/6 or 16.7 % or is there a more accurate estimate.