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A very fast Haskell library for generating high quality pseudo-random numbers.
Haskell R Shell

Require Cabal >=

Otherwise '!MIN_VERSION_foo(...)' won't work.
latest commit ef00dea28b
@23Skidoo 23Skidoo authored


Efficient, general purpose pseudo-random number generation

This package provides the System.Random.MWC module, a Haskell library for generating high-quality pseudo-random numbers in a space- and time-efficient way.

Get involved!

Please report bugs via the github issue tracker.

Master git git repository:

  • git clone git://

There's also a Mercurial mirror:

  • hg clone

(You can create and contribute changes using either Mercurial or git.)


This library is written and maintained by Bryan O'Sullivan,

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