PROFAD Here is a problem:
After obtaining the list, click the (say) Prime Number button. This is supposed (I guess) to reverse the order of the primes, but it only does a piecewise job, so clicking again the Prime Number button does NOT reproduce the original order. For example, starting from 2,3,5,7,11,13, we go to the loop 11,13,2,3,5,7 7,5,3,2,13,11. The original order 2,3,5,7,11,13 cannot be recovered any more. This goes for the Index button as well.
(Version 2.0)