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Currently the newest version is beta 2. If you are a donator with an old version, just redownload the miner from the link I sent you.

I am working on an OpenCL GPU miner for Primecoin. I fully intend to release it open-source and for free when it's ready.

Progress reports: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

When will it be released?

The closed beta is now running (since 2013-09-02), and the public release will be in a week or two. If you are a donator but didn't get the miner, whine to me and I'll send it to you!

Why should I trust you?

I am the creator of the GPU miner Reaper. I was the first person to show that GPU mining Litecoins (i.e. scrypt) is possible and also a lot more efficient than on the CPU. I've made my own GPU miners for many coins, including Bitcoin, Litecoin and Yacoin, although not all of them have been released to the public. The Primecoin GPU miner will be free and open-source.

I am also a university math student, and I have made my own implementation of the Elliptic Curve Digital Signature Algorithm used by Bitcoin (and all its forks) to make transactions. From scratch. (Yes, that includes my own bignum library.) I know a lot about algebra, prime numbers and such.

Why not CUDA?

CUDA is not cross-platform. It only works on Nvidia cards, but AMD cards are the ones with the best performance. OpenCL works on all GPUs.

What operating systems will the miner support?

Windows and Linux.

How fast is the miner going to be?

Currently it's not really faster than a CPU. It'll be optimized in time, though.

Official development thread at ppcointalk: http://www.ppcointalk.org/index.php?topic=508

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