I am using Mathematica 11.1 to deterministically test the primality of a set of very large numbers (i.e. more than 1000 digits). Some of these calculations (understandably) take a lot of time (several days). I have purchased the Home/Hobby version of Mathematica, which allows the parallel use of 4 kernels.
I don't have the money to upgrade to a several-thousand-dollar version of the software, which would be able to use more kernels, so how do I make the most out of my current version? Are there ways to tweak the settings so that I can increase the speed of my computations?
The function I am using currently is ProvablePrimeQ, but the question remains valid for any other computationally expensive operation.
EDIT I am only using the function ProvablePrimeQ on large probable prime numbers. There is no script, no "code", just the single function.