Prime Benchmark is a fast and simple processor performance benchmark utility based on searches for prime numbers. It is a raw test of your CPU power in basic operations provided in a compact package.

Main features:
- duration of the test is 1 minute
- multi-threading is fully supported, i.e. multi-processor, multi-core, hyper-threading
- scores can be submitted online for comparison and you can submit your result each time you get a higher score

There are both installer and portable packages available. If you don't find it here, you may visit developer's site.