You can download the core 22 v 0.0.0 preview test core  [UPDATED 2 JUL 2018 17:13 EST]:

    md5 hashes:

    • MD5 (FahCore_22_OpenCL) = 8f2c2d7c82be618b96b568df0e7ad05b

    (If something goes wrong, just delete that file and the current release version of the core will be retrieved from the FAH servers.)

    Please configure your config.xml to include use client-type of internal and project-key of 11716, e.g.

    <client-type v='internal'/>

    <project-key v='11716'/>

    Do not use any other project keys besides 11716.

    NOTE: These WUs are short and are worth zero points to discourage others from trying to use them.

    When done, please delete the copies of FahCore_22 you overwrote and the client will re-download the current release version of the core.

    Please delete this core version before switching back to other non-test WUs!


    Before you start, make sure to stop your client. You will want to finish or terminate any WUs you are working on. Please remove (or rename) your work/ directory before proceeding.

    First, create the following directory if it does not yet exist: mkdir cores/ Next, move and rename the core: mv FahCore_22_OpenCL cores/ Finally, make it executable: chmod a+x FahCore_22_OpenCL cores/


    The paths will look something like



    All platforms