To not duplicate work others, it is necessary to reserve a range for calculations. Here you can reserve to yourselves a range and send results of the work. You can use this form for calculation of time. Load her to itself and use as the calculator.
While all data are sent on email, some time for their processing is required.
One N should be reserved for N up to 100.
Ten N should be reserved for N from 101 to 500.
Fifty N should be reserved for N from 501 to 1000.
It is suggested that a range be picked that can be completed or updated via email in about a 2-3 month period of time. If a range is reserved for more than 6 months without a status update, you will be contacted via e-mail. If that is unsuccessful, the range will be unreserved.
This Excel file shows some timings for N, according to the already factored ranges.