Uniform random number generator (RNG)

[Carter2x]

I am writing a program in Fortran language, in which i use a Random Number Generator (RNG) subroutine.
Until now i used ran1 from " Numerical Recipes in fortran ,second edition, Page 271 ", but i think it is quite slow.
While searching on the internet for a faster RNG i found a few Fortran subroutines
(many were in other languages C/C++ ...), but they were slower than the one i had.
Do you know were can i find a fast and quite longperiod (>= 10^12) RNG ?

 

[CRGreathouse]

Mersenne Twister

 

[Louisa]

I am writing a program in Fortran language, in which i use a Random Number Generator (RNG) subroutine.
Until now i used ran1 from " Numerical Recipes in fortran ,second edition, Page 271 ", but i think it is quite slow.
While searching on the internet for a faster RNG i found a few Fortran subroutines
(many were in other languages C/C++ ...), but they were slower than the one i had.
Do you know were can i find a fast and quite longperiod (>= 10^12) RNG ?

Have you tried using the one that's part of the language?

George Marsaglia developed a number of PRNGs.
Some produce integers directly, others produce floating-point values directly.

 

[D H]

Until now i used ran1 from " Numerical Recipes in fortran ,second edition, Page 271 ", but i think it is quite slow.

ran1 is fast, but it is lousy (it has way too short a period). What makes you think it is slow?

You can have fast or you can have good. Asking for both at once is a bit much.