Depends on the usage. Commonly available "legit" PRNGs have uniform distribution, even over long range of numbers. Wikipedia has a list of interesting tests yo

Depends on the usage. Commonly available "legit" PRNGs have uniform distribution, even over long range of numbers. Wikipedia has a list of interesting tests you could do to confirm you PRNG: https://en.wikipedia.org/wiki/Pseudorandom_number_generator#BSI_evaluation_criteria https://en.wikipedia.org/wiki/Pseudorandom_number_generator#... where first two are interesting for a non-cryptographic PRNG.