Mine on the PC I use most of the time (the bad one) are:
CPU AMD Athlon 64 Processor 3200+
CPU Speed 2.0 GHz
RAM 1.0 GB
OS Microsoft Windows XP Professional Service Pack 3 (build 2600)
Video Card GeForce 6200 TurboCache
Dedicated Video RAM 768 MB
Sound card Realtek High Definition Audio
Free disk space 32.1 GB
Info colected using http://www.systemrequirementslab.com
So according to this, I shouldn't be able to run Minecraft...