Hi, can i found a block with a usb-stick miner with 2,5 Gh/s and 549k best share?
Of corse you can, if* you are Lucky!
The chance for you is:
2500000 : (actual Difficulty)

Best Share is a display to keep you going, but useless.
* con did this IF in a size of 84" and in red, I missed this.