How to calculate manually p value from F distribution with Degree of freedom 1 and 2?

[uma]

I want to calculate manually p value from F distribution with degree of freedom 1 and 2
(without any calculator or without any build in function).

Example:
degree of freedom v1: 1
degree of freedom v2: 28
F value: 242450.3519
we used FDist function in excel and got following result. (p value): 1.12E-56, How to achieve this result without any excel function?

Just I want to know, how to do calculation manually without using excel FDIST function.

 

[Dason]

Numeric integration. So yeah you really do need some software of some kind - this isn't something you just do 'by hand'.

Also that's a crazy example and I don't think anybody would need the p-value. Just by looking at the F value you know that the p-value is going to be tiny tiny tiny.

 

[uma]

Thank you for the reply.

I am doing some software and I need to calculate the P Value based on F distribution, degree of freedom 1 and 2.
We found all the three values (F distribution, freedom 1 and 2) except P Value.
For us P Value is important to declare the result. If you know the answer, please help us to proceed further.

 

[Dason]

By "doing some software" I assume you mean you're writing some program? Most languages have libraries you can import to help with this. What language are you using