I created new project. It calculates specified function in your browser with arguments given by server. Server saves results and send new task for you.
Currently it checking is number prime or not. But function can be different. You can suggest function in comments.
If you have spare computer, and you can not install BOINC, you can join this project and receive gridcoin for finding primes in browser. It also works with iPhones and even PSP.
Every day 10 GRC will distributed between participants. Amount can be changed, depends of participants count.
How to use
Enter your Gridcoin address and press start button. Your browser will download numbers from server, check is number prime and send it back.
Also you can see stats and list of found primes.