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btw i can offer 115bit range only 1 key, for make this key i need 0.75btc for buying 3090rtx gpu's for my calc fast to within 7 days Smiley, but here no one have this for work of months to days Smiley
For me, to even consider it, I'd have to know your method/how you cut it to 115 with only 1 key. I don't doubt you can, just never seen it.Best I did once was to cut it down to 108 bit, with 1 out of 2048 keys being in the range.
And couldn't do it for less than .50 btc
and do you think july 2021 status at blockchain for 120 puzzle is solved and transfered