Questions about kuiper test

Hello all,
I have two questions about kuiper test implementation in astropy:

  1. Is the false positive probability (FPP) the same as the p-value? If they are not same, then how should I interpret the values of FPP to see whether null hypothesis is rejected for a specific significance level?
  2. Does this implementation of kuiper test have any limits in the size of data? I mean can it be use for data sizes in order of hundreds or a few thousands?