Missing 10 Characters in WIF Private Key - Can I recover them?

[NotATether]

Update:

The OP has since identified two of the unknown WIF characters at the end. We managed to get Bitcrack running on his two GTX 1070's searching for the remaining 8 characters at a combined speed of 400Mkeys/s, over Discord.  The estimated runtime is 16 days. Hopefully, it turns up with his lost WIF.

[1714652930]

1714652930

[1714652930]

1714652930

[1714652930]

1714652930

[PawGo]

Indeed. He contacted me and we have some estimations. With 10 missing characters it is really doubtful, but as he wants to risk with 2 extra characters, it is more realistic. My estimation for his cards was 400MKeys but with settings he sent me it will be a bit less. Estimation was 11 days, BUT unfortunately he said he is not sure about the beginning, so maybe it will be around 40 days total (11 days for Kz, Ky, Kx and around 7 days for Kw).
We will see…

[mynonce]

Update:
The OP has since identified two of the unknown WIF characters at the end.

Very good! But not that way? Do you know, how?

and for the WIF private key I'd have Kw**********jcQmKRPNTF8CU9H1thzC981DCrZgmS4m8ygXFCEk (this is just an example, no funds are here)

Is the paper missing after Kw or is there enough paper for some letters, so that the chemical analysis would help you to recover some more characters to make the calculation easier?

For example:
Kw**********jcQ...

** -> paper / chemical analysis / recover characters
****** -> hole / no paper

-> so you would have 6 missing characters

[LoyceV]

The OP has since identified two of the unknown WIF characters at the end.

I'm curious: how did they do this?
Was it something like mynonce's scenario?

Kw**********jcQ...

** -> paper / chemical analysis / recover characters
****** -> hole / no paper

[NotATether]

The OP has since identified two of the unknown WIF characters at the end.

I'm curious: how did they do this?
Was it something like mynonce's scenario?

Kw**********jcQ...

** -> paper / chemical analysis / recover characters
****** -> hole / no paper

It was through taking a hard look at the piece of paper, not any chemical analysis 

[pooya87]

~ remaining 8 characters at a combined speed of 400Mkeys/s, over Discord.  The estimated runtime is 16 days. ~

These numbers don't look correct.
With 8 missing characters it should take less than 4 days (1/4 the reported runtime) to check all permutations.

Code:

58^8= 128,063,081,718,016 / 400,000,000 k/s = 320,157 s = 3.7 days

[PawGo]

~ remaining 8 characters at a combined speed of 400Mkeys/s, over Discord.  The estimated runtime is 16 days. ~

These numbers don't look correct.
With 8 missing characters it should take less than 4 days (1/4 the reported runtime) to check all permutations.

Code:

58^8= 128,063,081,718,016 / 400,000,000 k/s = 320,157 s = 3.7 days

I had different calculations... Anyway, the problem is that OP is unsure about one of known characters, so work must be multiplied *4.

[cryptojunkietron]

Check your pm for a python script

[NotATether]

~ remaining 8 characters at a combined speed of 400Mkeys/s, over Discord.  The estimated runtime is 16 days. ~

These numbers don't look correct.
With 8 missing characters it should take less than 4 days (1/4 the reported runtime) to check all permutations.

Code:

58^8= 128,063,081,718,016 / 400,000,000 k/s = 320,157 s = 3.7 days

That's because he wasn't sure that the "w" at the beginning of "Kw" was correct so he wanted to check Kw, Kx, Ky and Kz just to be sure.

[soferox]

Check your pm for a python script

No python script...

As to everyone else who has been helping thank you so much. I will 100% give a bounty out to everyone that has added some help to this effort. I am really hoping the 2 newly identified characters are correct. Based on my estimation with a missing 8 characters and unsure if the second if its w, x, y, z it will take 3.9 days per run (w, x, y, z are the runs) so 3.9 x 4 is roughly ~16 days. I hope to come back with really good news and if not well lesson learned to get water proof paper lol...

Thank you all again,
S.

[Alpaste]

its more than 16 days now... I hope you could find something bro.

[Alpha Machina]

Hey Bro, I read through everything. I Know John Cantrell Wrote a program in Rust for seed phrases. We could tweak that and make it work for PKEYS. Let me try tweaking it and if it works Ill update you all and go from there. I have 8 Tesla V100s that may also help if need be. If anyone here is a Rust language Master please PM me as I am only Learning it.

[ABCbits]

Hey Bro, I read through everything. I Know John Cantrell Wrote a program in Rust for seed phrases. We could tweak that and make it work for PKEYS.

Do you mean those software?
https://github.com/johncantrell97/bip39-solver-gpu
https://github.com/johncantrell97/bip39-solver-server

Let me try tweaking it and if it works Ill update you all and go from there. I have 8 Tesla V100s that may also help if need be. If anyone here is a Rust language Master please PM me as I am only Learning it.

Since BitCrack already utlize GPU, do you think it's possible to achieve higher hashrate (with same device) by modifying his software?

[PawGo]

Since BitCrack already utlize GPU, do you think it's possible to achieve higher hashrate (with same device) by modifying his software?

For some cases my program is a least 2x faster than BitCrack.
https://github.com/PawelGorny/WifSolverCuda | https://bitcointalk.org/index.php?topic=5382190.0

About the subject - OP is working on the problem, but apparently the decoded characters were not correct, so there is much more work than expected.

[Alpha Machina]

Since BitCrack already utlize GPU, do you think it's possible to achieve higher hashrate (with same device) by modifying his software?
[/quote]

I guess so because His program can utilise Multiple GPUs where as bitcrack can only use 1 at a time. And for the guy posing the WIFsolver CUDA does it work with multiple GPUs. I have 8 Tesla V100s on a 2x Xeon 256 GB ram server. Let me know if we wanna try out something before this Sunday. As i am flying out to a remote place for work and won't be available for 2 weeks unless there is network here and there sometimes.

[PawGo]

I guess so because His program can utilise Multiple GPUs where as bitcrack can only use 1 at a time. And for the guy posing the WIFsolver CUDA does it work with multiple GPUs.

You may always split the work. The same with BitCrack. There is even option to use the specified part of given range - so you may launch 8 instances with the same configuration and then specify for each device to process 1/8, 2/8, 7/8 of the range... I think I will add something like that to my program, good idea.

[rosengold]

how this thing ended ? OP found it ?

[casinotester0001]

how this thing ended ? OP found it ?

Here they're searching it:

https://bitcointalk.org/index.php?topic=5404406.0

[PawGo]

how this thing ended ? OP found it ?

Here they're searching it:

https://bitcointalk.org/index.php?topic=5404406.0

It has nothing to do with original question (at least not based on what I know). OP claims he is still searching for his WIF, as he wrongly decoded some characters, and work continues. Nothing new is known.
It is true WIF500 is a very similar problem (similar combination of known characters and missing ones).

[casinotester0001]

It has nothing to do with original question (at least not based on what I know). OP claims he is still searching for his WIF, as he wrongly decoded some characters, and work continues. Nothing new is known.
It is true WIF500 is a very similar problem (similar combination of known characters and missing ones).

Find the WIF challenge https://github.com/phrutis/wif500

Suppose you do find the coins (which actually belong to @soferox) - how will you return them to him?

Some others think it too