A general fortran question involving large integers

[TheIsingGuy]

Hi,

Like the title says, I am trying to implement an algorithm involving really big integers, on the order or 1E30, However, Fortran's largest integer type integer(kind = 8) only accept upto (2^63)-1 which is around 1E18, not even nearly enough for me.

I tried to define an integer with the value 1E30, and fortran assumed it was (2^63)-1, as above.

Does anybody know a way around this?

Any help is appreciated

TheIsingGuy

[davekw7x]

Originally Posted by TheIsingGuy

...really big integers

There are several arbitrary precision numerical packages that might meet your needs. For starters, you can check the links to the mpfun and arprec packages here: http://www.netlib.org/mpfun/

Regards,

Dave

[TheIsingGuy]

Thanks dave,