What is the period of the PRBS signal used in the randi() function?

I cannot find information on the PRBS seed used in the randi() function. How can I find the period of the seed used to generate random numbers or how long it takes til the signal repeats i.e. 2^31-1 or 2^15-1?

Answer 1

[Guillaume]

As documented the default random number generator is Mersenne Twister which according to wikipedia has a period 2^19937 − 1. I'm sure you can do a search with your favorite search engine for the other number generators.