This week's giveaway is in the Android forum. We're giving away four copies of Android Security Essentials Live Lessons and have Godfrey Nolan on-line! See this thread for details.

That binary pattern IS -1. Because it is 2's complement. As the sign bit(the left most) is 1, so it is a negative number, in order to calculate its absolute value, you can do the following: bitwise negation first, then plus 1. So the all 1 pattern will become 000000...01.