

0xffffffff is the biggest 32-bit integer, in a notation used in C, C++, and some other programming languages.
Please appraise.
When I registered the domains I could not believe 0xffffffff are not occupied, and thought I had fould something very valuable. Now, after listening to your common sense, I know that I should either try to develop them or just drop them
Thank you all for your appraisals and the I ideas about these domains.

