Quote from: MrlostinBTC on June 22, 2023, 09:17:27 PM

Quote from: sssergy2705 on June 22, 2023, 08:43:11 PM

Interested here is a question. If the end of the key is known, but there is no possibility of reverse recovery. Is it possible to restore the full key in this case? I remember there used to be a wif-solver-cuda program for wif, but is there such a program for hex private key?

It doesn't matter that the keys are in HEX. You can convert them to WIF and then use the according base keys to generate valid address. I encountered the same problem. WIF validation may be correct however there are way too many possible keys. What is interesting is uncompressed format there is a few less bytes to deal with, which in turn could be converted back to compressed if needed. Ill leave a couple examples here.

EC 0000000000000000000000000000000000000000000000000000000000000001
KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgd9M7rFU73sVHnoWn
5HpHagT65TZzG1PH3CSu63k8DbpvD8s5ip4nEB3kEsreAnchuDf

EC 0000000000000000000000000000000000000000000000000000000000000003
KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgd9M7rFU74sHUHy8S
5HpHagT65TZzG1PH3CSu63k8DbpvD8s5ip4nEB3kEsreB1FQ8BZ

EC 00000000000000000000000000000000000000000000000000000022382FACD0
KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgd9P3MahktLW5315v
5HpHagT65TZzG1PH3CSu63k8DbpvD8s5ip4nEB4BW8dsj4c9a6g

EC 000000000000000000000000000000000000000000000001A838B13505B26867 - puzzle 65
KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qZM21gaY8WN2CdwnTG57
5HpHagT65TZzG1PH3CSu63k8DbpvD8s5ipCnYRNeQuRFKarWVVs

KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgd9M7rFU73sVHnoWn
KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgd9M7rFU74sHUHy8S
KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgd9P3MahktLW5315v
KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qZM21gaY8WN2CdwnTG57

So we could say upcoming puzzles private key 66 will start with...

KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3

True, but you are just saying that in hex representation key to puzzle 66 is
000000000000000000000000000000000000000000000002XXXXXXXXXXXXXXXX
or
000000000000000000000000000000000000000000000003XXXXXXXXXXXXXXXX

which we already know lol