hi, is there any chance to make a option to save the ranges searched and if power outage come so when search again in random mode to not search the same ranges?
If you are using random mode, the program does not stay in a specific range, other than the one you supplied. It randomly bounces around in the bits range or the beginning/ending range you supplied.
What you can do is keep track of any ranges you supplied with beg and end ranges. But you can do that manually or use a program like python to keep track of them.