Greetings! The task you require is not of simple ones no matter the c program would looks like. However as my reputation on this platform is still beginner I'll do your project for 60$. I have been using openMP for year on my computer to speed up big partial differential equation problems for my Immunology project. Desirable results guaranteed. As for dates, I am free on Mon, Thu, Fri, Sun and project is doable in 24 hours.
Also, should you require paralleling the software on CUDA or MPI let me know, we could negotiate on it as well.
Milestone is required in order to start the project.
Cheers,
George