I have an idea. Maybe is a stupid one but it`s I think simple. Can we all just make GPU pool to work all thogether to crack puzzle #66 to #69? I'm using VBCr2 on windows 11 with 2x GTX 1060 6GB and 1x GTX1080ti (old pc).
Next week I will buy another used GTX 1080ti and I will add it to my pc. Currently I am seaching with 800mil. keys per sec and with the fourth gpu I will have arround 1200-1250mil. keys per second. I made some raw calculation about how much time it will take me at best to find the private key for the #66 puzzle with 800mil. keys per sec - at best 5 mounts! If we can shorten that time it will be good.