As I said herb was testtest and has mined multiple times at 3 and 3.5 billion keys a second. I have been in contact with him for a while now so I trust his ranges. He is the one who found several of the larger brute forced ranges. I would not have added it if I had doubt.
ttdclient
I think he is mining solo again. If he find key he will grab full reward. If we find key he will grab major part of reward. Win-win strategy. I'll not participate on this.