We Need Your Help!

In advance of the Alan Turing Year challenge (June 20-23), we are inviting everyone do a little bit of CUDA sieving to help prepare the GFN search for its next steps.

While the Alan Turing Year challenge itself is going to use the short (N=524288) WUs, we need more sieving done on the long (N=4194304) WUs. Fortunately, AXN just wrote a CUDA based sieve that is ridiculously fast. It's so fast that with a little help we should be able to complete the sieve -- to DOUBLE the original goal -- before the challenge starts.

So if you're currently using your GPU(s) to crunch GFN (or anything else) -- especially if you're currently crunching short N=524288 WUs -- please consider switching over to GFN sieving until the challenge starts. Lets save those short WUs for the challenge.

The new sieve program is extremely easy to use, so if you've never done manual sieving before and/or want to get some easy PSA credits, this is the way to do it.

For more information on helping with GFN sieving, please see the thread in the Sieving Forum.

For more information on the challenge see the post about the Alan Turing Year challenge.
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