Topic: BitCrack - A tool for brute-forcing private keys - page 5. (Read 77093 times)

Needs too much effort more then guessing 256 bit key 
[/quote]

I read your posts on the forum.  If you take the last digits of any private key and go through the entire range, you will find the key
check this
-b 64 -t 512 -p 1600 --keyspace 7FFFFFFFFF9112D4:FFFFFFFFFFFFFFFF 16jY7qLJnxb7CHZyqBP8qca9d51gAjyXQN --stride 1000000
-b 64 -t 512 -p 1600 --keyspace FFFFFFFFF5B26867:1FFFFFFFFFFFFFFFF 18ZMbwUFLMHoZBbfpCjUJQTCMCbktshgpe  --stride 10000000
zahid888 i think you are on the right track
you for 66 you need to find 7 digitsneed to look in the starting range 0-9  A-F = full brute force 16^7

I don't know how to speed it up



[2023-06-19.21:22:02] [Info] Compression : compressed
[2023-06-19.21:22:02] [Info] Starting at : 000000000000000000000000000000000000000000000001FFFFFFFFF0000A18 (65 bit)
[2023-06-19.21:22:02] [Info] Ending at   : 000000000000000000000000000000000000000000000003FFFFFFFFFFFFFFFF (66 bit)
[2023-06-19.21:22:02] [Info] Range       : 000000000000000000000000000000000000000000000002000000000FFFF5E7 (66 bit)
[2023-06-19.21:22:02] [Info] Initializing NVIDIA GeForce RTX 3080
[2023-06-19.21:22:02] [Info] Generating 52,428,800 starting points (2000.0MB)
[2023-06-19.21:22:05] [Info] 10.0%  20.0%  30.0%  40.0%  50.0%  60.0%  70.0%  80.0%  90.0%  100.0%
[2023-06-19.21:22:07] [Info] Done
[DEV: NVIDIA GeForce R 9156/10239MB] [0000000000000000000000000000000000000000000000036A7FFFFFF0000A18 (66 bit)] [INC: 0, 0] [TARGET: 1] [SPEED: 1663.50 MKey/s] [TOTAL: 6,081,740,800] [00:00:01][2023-06-19.21:22:12] [Info] Reached end of keyspace


[2023-06-19.21:22:13] [Info] Compression : compressed
[2023-06-19.21:22:13] [Info] Starting at : 000000000000000000000000000000000000000000000001FFFFFFFFF0000A19 (65 bit)
[2023-06-19.21:22:13] [Info] Ending at   : 000000000000000000000000000000000000000000000003FFFFFFFFFFFFFFFF (66 bit)
[2023-06-19.21:22:13] [Info] Range       : 000000000000000000000000000000000000000000000002000000000FFFF5E6 (66 bit)
[2023-06-19.21:22:13] [Info] Initializing NVIDIA GeForce RTX 3080
[2023-06-19.21:22:13] [Info] Generating 52,428,800 starting points (2000.0MB)
[2023-06-19.21:22:16] [Info] 10.0%  20.0%  30.0%  40.0%  50.0%  60.0%  70.0%  80.0%  90.0%  100.0%
[2023-06-19.21:22:18] [Info] Done
[DEV: NVIDIA GeForce R 9156/10239MB] [00000000000000000000000000000000000000000000000370BFFFFFF0000A19 (66 bit)] [INC: 0, 0] [TARGET: 1] [SPEED: 1691.25 MKey/s] [TOTAL: 6,186,598,400] [00:00:01][2023-06-19.21:22:23] [Info] Reached end of keyspace


[2023-06-19.21:22:23] [Info] Compression : compressed
[2023-06-19.21:22:23] [Info] Starting at : 000000000000000000000000000000000000000000000001FFFFFFFFF0000A1A (65 bit)
[2023-06-19.21:22:23] [Info] Ending at   : 000000000000000000000000000000000000000000000003FFFFFFFFFFFFFFFF (66 bit)
[2023-06-19.21:22:23] [Info] Range       : 000000000000000000000000000000000000000000000002000000000FFFF5E5 (66 bit)
[2023-06-19.21:22:23] [Info] Initializing NVIDIA GeForce RTX 3080
[2023-06-19.21:22:24] [Info] Generating 52,428,800 starting points (2000.0MB)
[2023-06-19.21:22:27] [Info] 10.0%  20.0%  30.0%  40.0%  50.0%  60.0%  70.0%  80.0%  90.0%  100.0%
[2023-06-19.21:22:29] [Info] Done
[DEV: NVIDIA GeForce R 9156/10239MB] [0000000000000000000000000000000000000000000000036D9FFFFFF0000A1A (66 bit)] [INC: 0, 0] [TARGET: 1] [SPEED: 1663.50 MKey/s] [TOTAL: 6,134,169,600] [00:00:01][2023-06-19.21:22:34] [Info] Reached end of keyspace

how do you come up with this false claim? please show us the decimal value of the relative position for puzzles 38 and 60 as an example. And then... Well, what do you find ?

First off, Doing this publicly will warn everyone about possible vulnerabilities and weaknesses, demonstrating to the world how we can find the keys of low range and exposed public keys will send the signal to everyone that they need to use standard and secure wallets to generate keys with high entropy and also never use an address more than once.

On the other hand, there are hundreds of thousands of bitcoins on exposed keys for years, nobody has managed to touch them.
If you want to be 100% assured of the safety of your coins, just store them on an address and when you are spending, don't use the same address as the return address, done and safe for a few billion years.😉

I never thought bitcoin/blockchain technology will see a day where people are making efforts to brute force the only technology that we need to keep the way it is or just improve on the sides of network adoption, feasibility in terms of fees, p2p and KYC free adoption. This should be the development we need to have right now and not the other way around.

I see some negative implications of this idea. Irrespective of what others think I don’t like the idea of having brute force technology. It would be obvious that soon others will copy it and start misusing the same for their own benefit. Not sure if this is only for one time use but it’s bad idea.

By just reading it I’m frightened about my wallet security. Lolz.

It's time to leave the basement and join the outside world, bitcoin is an open source technology using a publicly accessible elliptic curve, whole point of using EC is due to the difficulty of finding randomly generated big private keys.

However to demonstrate how difficult it actually is, allegedly @Satoshi himself organized a series of puzzles placing bitcoins in extremely easy bit ranges and after some times some people figured it out and started  to post     topics about the subject, it was originally around 32 bitcoins, then it was increased to 100, and  2 weeks ago he added around 900 more bitcoins totalling around 1000 BTC as a prize for solvers. It has been done with consent and is totally legal.

Do also note that brute forcing any large private key will take billions of years, and brute forcing a small key in a very very small range will take decades with many high end GPUs.

Further more, all the available "cracking" tools are inefficient as they are just not enough to pose any threat.

Ps, around these woods we operate by bit and x,y, we are alien to terms such as ethics. Lol.😉

Buddy this is a cpu only script at the moment and building on it, as Bitcrack is not working on any improvement. Yeah it does 16 Mil per thread, at 8 thread rig it should do 128 Mil per day, my server does about 512 Mil per process, but only run 1 at time as I need server to do allot of other stuff to.
Running 5 X processes of above that peaks by cpu at 80% gives me 128 x 5 Mil per day

If you think you can optimize the code to check faster, then try.

And will update the code to use GPU and CPU hopefully soon, just ironing some cuda bugs.
I did tests with bitcrack where I gave it 1 Bil keys to check with a correct one in these large ranges. It missed to match it, thinking due to same bug i'm having with cudo cores splitting the decimal processing when working with these large decimals.

With what 800 quad quadrillions possibilities your talking 100 of thousands of years, that is if you check from bottom to top, randomly is another ball game, as random numbers can repeat, but at least you have a fat chance in hell as who has a few millions years to check from top to bottom?

My data in my sheet in github did however reveal an interesting pattern. The decimals of all the private keys of every puzzle are within 12% to 49% of the base decimal (range)
So if the pattern repeats with next puzzles you can only check this above decimal ranges

I have a script currently doing that, just get the decimal of the private key :
current_decimal = int.from_bytes(bytes.fromhex(key.private_hex), 'big')
Check if is in range 12 - 49%, if not, no need to waste processing and checking it against public key
this however just gives me a 11 500 X 1.2 boost per thread per second

When I get the gpu part working I will also work on a reversed engineered sha256 function, we know the public key is generated by the private key, and we know the public key. So maybe we can find a formula to exclude a large list of the private keys to check that will never resolve to certain characters in the public key

Lastly I was thinking of doing a database of checked keys to, but to check database will slow it down, but if multiple rigs update it, might lead to someone finding it faster. Seems bit unfair as only someone will get the spoils even if it is a team effort and concerned that this will lead to poeple raping my server that hosts the what 80 gig database in the end

Also in my sheet I was hoping their is a pattern in the decimal multiplier from one puzzle to the next :

y = base high / decimal
x > y
z = x - y
x = z + y
x = x

So if they had a method to determine the next puzzle, a solution could be to find the x multiplier, but so far, I've not been able to find it

Were you in a cave for the last couple of years? I mean my old laptop with a low end GPU can eat 30MK/s, now you want us to chew 17 Mk in a day? Wasn't it enough that with trillions of keys per second we'd still be years from finding 66, now we have to keep searching till the sun dies off into darkness.🤣

Keep at it though, every person is an asset ( to share our desperation and despair). Sigh. Lol

Interesting puzzle, I checked for patterns between binary values, decimal values, floor values. Just cant find anything

I updated an excel sheet puzzle bitcoin.xlsx with allot more data of each puzzle. Like decimal, binary, floor, and allot more data per puzzle. Even multipliers of the data to the next puzzle.

Since this range is just so huge, I think a random generator would maybe work best to try and find the needle.

I attached below my python script trying the next puzzle randomly if someone might benefit to

https://github.com/negate7o4/Bitcoin-Puzzle

On my rig, I7 if I run 5 X instances, it checks about 11 500 possibilities per second per thread, but eats 80% cpu. So the code chews threw 16.5 Mil random possibilities per day

If you want to try a different puzzle, just change these values in the script :

address = '1FeexV6bAHb8ybZjqQMjJrcCrHGW9sb6uF'

start_key = '0000000000000000000000000000000000000000000000040000000000000000' stop_key = '000000000000000000000000000000000000000000000007ffffffffffffffff'

Also take note of the cpu threads the code uses, update according to your threads.

Their is also a text file in my repository of the correct pip's you need to install for the code to work

https://github.com/WanderingPhilosopher/VanBitCrackenRandom

https://github.com/WanderingPhilosopher/VanBitCrackenRandom2

Well, the vulnerabilities already exist, we don't know about them yet, this puzzle needs to go on for ever, and it should remain filled with hundreds of bitcoins, just imagine if someone had access to a backdoor or some sort, they could at least take the puzzle prizes because it wouldn't be theft, but if there is no puzzle prize, the exploiter could be tempted to go after people's coins.😉

Still it’s fascinating to play around and see what others use as approaches. This only shows how good Bitcoin really is and I’m shure if satoshi is still around this would be one of the threads he would read with interest to see how Bitcoin performs 

this is senseless

For 66 I have been trying something like this.

 

================================ Deterministic wallet masked with leading Zeros ==================================


Bip44 : sadness behind zone combine purse sentence bench symbol rookie bag attract govern
Msk66 : 0000000000000000000000000000000000000000000000020000000000000000
Pkv66 : 000000000000000000000000000000000000000000000003e9542b9b08d3383b
Addrs : 13z7L2eYpaMRNEBmmT2EshBbxHUABDNccx
Range : 3e9542b9000000000:3e9542b9fffffffff
Prefx : 13zb1hQbW

VanBitCrackenS v1.0
Keyspace start=3E9542B9000000000
Keyspace   end=3E9542B9FFFFFFFFF
Search: 15 prefixes (Lookup size 15) [Compressed]
Started at Sun Mar 12 16:43:46 2023
CPU threads used: 0
GPU: GPU #0 NVIDIA GeForce RTX 3060 Ti (38x128 cores) Grid(304x512)
1118.441 MK/s (GPU 1118.441 MK/s) (2^36.25) [00:01:13 Elapsed Time][0]
[EXIT] Reached end of keyspace.

Finish at Sun Mar 12 16:45:01 2023

 ================================ Deterministic wallet masked with leading Zeros ==================================


Bip44 : deliver cute current mean dutch cloud city defy system exercise glide wet
Msk66 : 0000000000000000000000000000000000000000000000020000000000000000
Pkv66 : 000000000000000000000000000000000000000000000002b2d4e487b051ce63
Addrs : 13zb56FGSawmd1MuSsKJNrTWgNnRZwt6sz
Range : 2b2d4e48000000000:2b2d4e48fffffffff
Prefx : 13zb1hQbW

VanBitCrackenS v1.0
Keyspace start=2B2D4E48000000000
Keyspace   end=2B2D4E48FFFFFFFFF
Search: 15 prefixes (Lookup size 15) [Compressed]
Started at Sun Mar 12 16:47:34 2023
CPU threads used: 0
GPU: GPU #0 NVIDIA GeForce RTX 3060 Ti (38x128 cores) Grid(304x512)
1119.082 MK/s (GPU 1119.082 MK/s) (2^36.25) [00:01:13 Elapsed Time][0]
[EXIT] Reached end of keyspace.

Finish at Sun Mar 12 16:48:49 2023

 ================================ Deterministic wallet masked with leading Zeros ==================================


Bip44 : summer very sausage trust brown post immune advice valley opera little charge
Msk66 : 0000000000000000000000000000000000000000000000020000000000000000
Pkv66 : 000000000000000000000000000000000000000000000003598a8ee012faf870
Addrs : 13zbbSg7nRLSpyCNpJ3WZD1J9M6PUtvfC6
Range : 3598a8ee000000000:3598a8eefffffffff
Prefx : 13zb1hQbW

VanBitCrackenS v1.0
Keyspace start=3598A8EE000000000
Keyspace   end=3598A8EEFFFFFFFFF
Search: 15 prefixes (Lookup size 15) [Compressed]
Started at Sun Mar 12 16:50:04 2023
CPU threads used: 0
GPU: GPU #0 NVIDIA GeForce RTX 3060 Ti (38x128 cores) Grid(304x512)
1108.211 MK/s (GPU 1108.211 MK/s) (2^36.24) [00:01:13 Elapsed Time][0]
[EXIT] Reached end of keyspace.

Finish at Sun Mar 12 16:51:19 2023

 ================================ Deterministic wallet masked with leading Zeros ==================================


Bip44 : fatigue suggest claw strike give test use indoor hold romance coral insane
Msk66 : 0000000000000000000000000000000000000000000000020000000000000000
Pkv66 : 00000000000000000000000000000000000000000000000217a4dd28cf107aa2
Addrs : 13zPcX7WPcLCYSaavTwg2ntBGH8pVHb76Z
Range : 217a4dd2000000000:217a4dd2fffffffff
Prefx : 13zb1hQbW

VanBitCrackenS v1.0
Keyspace start=217A4DD2000000000
Keyspace   end=217A4DD2FFFFFFFFF
Search: 15 prefixes (Lookup size 15) [Compressed]
Started at Sun Mar 12 16:52:35 2023
CPU threads used: 0
GPU: GPU #0 NVIDIA GeForce RTX 3060 Ti (38x128 cores) Grid(304x512)
1097.404 MK/s (GPU 1097.404 MK/s) (2^36.24) [00:01:13 Elapsed Time][1]
[EXIT] Reached end of keyspace.

Finish at Sun Mar 12 16:53:50 2023

 ================================ Deterministic wallet masked with leading Zeros ==================================


Bip44 : stuff kiss clog easy present fancy scrub climb link input rural globe
Msk66 : 0000000000000000000000000000000000000000000000020000000000000000
Pkv66 : 0000000000000000000000000000000000000000000000024c4a7d632c865b7b
Addrs : 13zYHtjJYESDvXXnXtymtDxFqB5tYxjJqt
Range : 24c4a7d6000000000:24c4a7d6fffffffff
Prefx : 13zb1hQbW

VanBitCrackenS v1.0
Keyspace start=24C4A7D6000000000
Keyspace   end=24C4A7D6FFFFFFFFF
Search: 15 prefixes (Lookup size 15) [Compressed]
Started at Sun Mar 12 16:56:35 2023
CPU threads used: 0
GPU: GPU #0 NVIDIA GeForce RTX 3060 Ti (38x128 cores) Grid(304x512)
1108.418 MK/s (GPU 1108.418 MK/s) (2^36.25) [00:01:13 Elapsed Time][1]
[EXIT] Reached end of keyspace.

Finish at Sun Mar 12 16:57:50 2023

 ================================ Deterministic wallet masked with leading Zeros ==================================


Bip44 : inquiry suit dentist detail gap pumpkin income dwarf express figure person enter
Msk66 : 0000000000000000000000000000000000000000000000020000000000000000
Pkv66 : 000000000000000000000000000000000000000000000003159cfd7dde56dbc9
Addrs : 13zTojop1dzyxufJL5mkuWYCAiunW37vKN
Range : 3159cfd7000000000:3159cfd7fffffffff
Prefx : 13zb1hQbW

VanBitCrackenS v1.0
Keyspace start=3159CFD7000000000
Keyspace   end=3159CFD7FFFFFFFFF
Search: 15 prefixes (Lookup size 15) [Compressed]
Started at Sun Mar 12 16:59:37 2023
CPU threads used: 0
GPU: GPU #0 NVIDIA GeForce RTX 3060 Ti (38x128 cores) Grid(304x512)
1109.837 MK/s (GPU 1109.837 MK/s) (2^36.25) [00:01:13 Elapsed Time][0]
[EXIT] Reached end of keyspace.

Finish at Sun Mar 12 17:00:52 2023

 ================================ Deterministic wallet masked with leading Zeros ==================================


Bip44 : anxiety raccoon clarify mule immense left wing any race today copy home
Msk66 : 0000000000000000000000000000000000000000000000020000000000000000
Pkv66 : 0000000000000000000000000000000000000000000000021eaaae7cea5af2f2
Addrs : 13z5MJcCTKHwVzC6C2hbXNMyAwGXMceYd7
Range : 21eaaae7000000000:21eaaae7fffffffff
Prefx : 13zb1hQbW

VanBitCrackenS v1.0
Keyspace start=21EAAAE7000000000
Keyspace   end=21EAAAE7FFFFFFFFF
Search: 15 prefixes (Lookup size 15) [Compressed]
Started at Sun Mar 12 17:02:11 2023
CPU threads used: 0
GPU: GPU #0 NVIDIA GeForce RTX 3060 Ti (38x128 cores) Grid(304x512)
1112.090 MK/s (GPU 1112.090 MK/s) (2^36.25) [00:01:13 Elapsed Time][0]
[EXIT] Reached end of keyspace.

Finish at Sun Mar 12 17:03:26 2023

 ================================ Deterministic wallet masked with leading Zeros ==================================


Bip44 : scout boring super zebra swamp dance maze caution popular wait dance drive
Msk66 : 0000000000000000000000000000000000000000000000020000000000000000
Pkv66 : 00000000000000000000000000000000000000000000000232b86039f7aedbd8
Addrs : 13zwx4VKzyRUmQEjecnHxso88RVa34RJFC
Range : 232b8603000000000:232b8603fffffffff
Prefx : 13zb1hQbW

VanBitCrackenS v1.0
Keyspace start=232B8603000000000
Keyspace   end=232B8603FFFFFFFFF
Search: 15 prefixes (Lookup size 15) [Compressed]
Started at Sun Mar 12 17:05:01 2023
CPU threads used: 0
GPU: GPU #0 NVIDIA GeForce RTX 3060 Ti (38x128 cores) Grid(304x512)
1106.019 MK/s (GPU 1106.019 MK/s) (2^36.25) [00:01:13 Elapsed Time][0]
[EXIT] Reached end of keyspace.

Finish at Sun Mar 12 17:06:16 2023

 ================================ Deterministic wallet masked with leading Zeros ==================================


Bip44 : reveal muffin accident harbor disagree maple enter spice divert stock when suit
Msk66 : 0000000000000000000000000000000000000000000000020000000000000000
Pkv66 : 000000000000000000000000000000000000000000000002c5c95f84b0f9520c
Addrs : 13zsB9pM1WXH2FdnVhpoyJkiMsaDpL5WgT
Range : 2c5c95f8000000000:2c5c95f8fffffffff
Prefx : 13zb1hQbW

VanBitCrackenS v1.0
Keyspace start=2C5C95F8000000000
Keyspace   end=2C5C95F8FFFFFFFFF
Search: 15 prefixes (Lookup size 15) [Compressed]
Started at Sun Mar 12 17:07:37 2023
CPU threads used: 0
GPU: GPU #0 NVIDIA GeForce RTX 3060 Ti (38x128 cores) Grid(304x512)
1109.461 MK/s (GPU 1109.461 MK/s) (2^36.25) [00:01:13 Elapsed Time][0]
[EXIT] Reached end of keyspace.

Finish at Sun Mar 12 17:08:51 2023

 ================================ Deterministic wallet masked with leading Zeros ==================================


Bip44 : sibling fence brave mirror picnic only harvest remember make torch protect daughter
Msk66 : 0000000000000000000000000000000000000000000000020000000000000000
Pkv66 : 000000000000000000000000000000000000000000000002a641ddfe686bb93f
Addrs : 13znKyww6sn8NhxibmPvfzqueLPLoEk9hi
Range : 2a641ddf000000000:2a641ddffffffffff
Prefx : 13zb1hQbW

VanBitCrackenS v1.0
Keyspace start=2A641DDF000000000
Keyspace   end=2A641DDFFFFFFFFFF
Search: 15 prefixes (Lookup size 15) [Compressed]
Started at Sun Mar 12 17:13:31 2023
CPU threads used: 0
GPU: GPU #0 NVIDIA GeForce RTX 3060 Ti (38x128 cores) Grid(304x512)
1118.169 MK/s (GPU 1118.169 MK/s) (2^36.25) [00:01:13 Elapsed Time][0]
[EXIT] Reached end of keyspace.

Finish at Sun Mar 12 17:14:46 2023

 ================================ Deterministic wallet masked with leading Zeros ==================================


Bip44 : paper ask blind spoon flat length arch bird upgrade certain abstract thank
Msk66 : 0000000000000000000000000000000000000000000000020000000000000000
Pkv66 : 000000000000000000000000000000000000000000000002264864827ec5d907
Addrs : 13zsck36JGo8jFPcHDqTZwK7AAgsJXMtgw
Range : 22648648000000000:22648648fffffffff
Prefx : 13zb1hQbW

VanBitCrackenS v1.0
Keyspace start=22648648000000000
Keyspace   end=22648648FFFFFFFFF
Search: 15 prefixes (Lookup size 15) [Compressed]
Started at Sun Mar 12 17:16:33 2023
CPU threads used: 0
GPU: GPU #0 NVIDIA GeForce RTX 3060 Ti (38x128 cores) Grid(304x512)
1111.710 MK/s (GPU 1111.710 MK/s) (2^36.25) [00:01:13 Elapsed Time][0]
[EXIT] Reached end of keyspace.

Finish at Sun Mar 12 17:17:48 2023

Yes, I was thinking about QCs as well. In fact, it is quite likely that some undisclosed powerful machine managed to find the #120 after searching for smaller ranges on the blockchain. Quite possibly without being aware of this forum.

I would say that a science lab team would not actually send the BTC - they normally follow good ethical standards.

I'd throw in "Quantum computers" into the discussion but considering that commercial versions are 20+ years away from reality, it's more likely that people will be alerted by some Google Project Zero researcher who finds and discloses a flaw in ECDSA, than by any brute forcing a bunch of crackers are doing

However, we'd make a good benchmark on how practical the exploits are for random people to pull off.

what about puzzle 66? 

chid = 12 e3d5306d21a01002b9c1c7009d09e9b4773b8f17ee609c760b225179c283983a
mask = 12 0000000000000000000000000000000000000000000000000000000000001000
puzz = 12 000000000000000000000000000000000000000000000000000000000000183a
addr = 12 1CQkWJjiN8XriTHTxHp1DTwmK6Jqw8g7uL

chid = 13 f7eaeb7e36ad6c888106571363dceb9ddbfb15ec42d599e8385f89a3f78d0975
mask = 13 0000000000000000000000000000000000000000000000000000000000002000
puzz = 13 0000000000000000000000000000000000000000000000000000000000002975
addr = 13 1D9Ke1efDzABEGjStePtq3K2kFvXL2ub9

chid = 14 f9a54d6d6d2242caab523cbf6b6f1a2f84333b9bed0f8c3be4b87014908a929b
mask = 14 0000000000000000000000000000000000000000000000000000000000004000
puzz = 14 000000000000000000000000000000000000000000000000000000000000529b
addr = 14 1DkS6GGepLbDtAsv5RUWZNzFpqpXp6Ghyp

chid = 15 b8a00b1257c99ba1a2478b41d283586f0c76c48b4237b5db31631feb371091e7
mask = 15 0000000000000000000000000000000000000000000000000000000000008000
puzz = 15 00000000000000000000000000000000000000000000000000000000000091e7
addr = 15 15GRgqRJr8LiacnRPb2iaSEJtXhfDJ1Q17

chid = 16 7c4fc3241d8ee50aa0e72f46c92ee3deae067fc09fbecfff28032174921ce7fb
mask = 16 0000000000000000000000000000000000000000000000000000000000010000
puzz = 16 000000000000000000000000000000000000000000000000000000000001e7fb
addr = 16 1Cx3WDjc3vHW4DTvGq1MtrU2rrVMvMZJR7

chid = 17 8f1641f977618f5f646df45cddc1faac4277fe6beed9ba61264f313d4b0ecf6a
mask = 17 0000000000000000000000000000000000000000000000000000000000020000
puzz = 17 000000000000000000000000000000000000000000000000000000000002cf6a
addr = 17 1LsG5kw7QwioKiMW3wspU3XTN31989c1Ds

chid = 18 1a6d15e555182b9961fd9b16b3ab1fa555b8f94c4e44395881d76713f0ed787c
mask = 18 0000000000000000000000000000000000000000000000000000000000040000
puzz = 18 000000000000000000000000000000000000000000000000000000000005787c
addr = 18 121KXamvwbNoaLYyjddVD9NqahMjjebTqK

chid = 19 f0aa486210b7d2e881eeffd95d02e4b9bf114191fe6d8648529abde391c496ab
mask = 19 0000000000000000000000000000000000000000000000000000000000080000
puzz = 19 00000000000000000000000000000000000000000000000000000000000c96ab
addr = 19 1Ka5pj9nmYQ5kwBewhydq2BVnLAQRSF3sG

chid = 20 aa48bf28b307ad3efe5ed2e35e244b39c4d91c7e6b1ee071ef8fa7cf56543c9e
mask = 20 0000000000000000000000000000000000000000000000000000000000100000
puzz = 20 0000000000000000000000000000000000000000000000000000000000143c9e
addr = 20 1Jj9EHtu2zM9Gu5hTRVfvtvHaKosnAR8cz

chid = 21 2933504b93161ab48a70acca16be5eaef56ef950e030b4f7b656d04e8b6fc17f
mask = 21 0000000000000000000000000000000000000000000000000000000000200000
puzz = 21 00000000000000000000000000000000000000000000000000000000002fc17f
addr = 21 1KrXCyRHiaQ9bdyCp1SC8kn9GDaFLCssQJ

chid = 22 32b349e7e2b975a82d3aa1b2ff12fda6f53697ef9745ed6621f70174c72bcf23
mask = 22 0000000000000000000000000000000000000000000000000000000000400000
puzz = 22 00000000000000000000000000000000000000000000000000000000006bcf23
addr = 22 15Fd9aZQTB2P483wHrLgF187BBrCom3Mft

chid = 23 75aad343bb176dd9b7e82a5e0918d04ebed50cce7a9b433cc422109769c20381
mask = 23 0000000000000000000000000000000000000000000000000000000000800000
puzz = 23 0000000000000000000000000000000000000000000000000000000000c20381
addr = 23 1J1KX8vL6GfnymvSG2dR9spJ3bJ5gv1Rqj

chid = 24 2a65a466500a6b0f7a2ee912e722b4a38663dd1482ce4afeeacbcc8ffeed84cc
mask = 24 0000000000000000000000000000000000000000000000000000000001000000
puzz = 24 0000000000000000000000000000000000000000000000000000000001ed84cc
addr = 24 1HNZxLPMtA9iXegM9iYkGwiDapn6XkYgBk

chid = 25 3b8ab28ba02f4bc9632b6efeb72cbee545b70e8b49e12178c34486c3d53d4fab
mask = 25 0000000000000000000000000000000000000000000000000000000002000000
puzz = 25 00000000000000000000000000000000000000000000000000000000033d4fab
addr = 25 1HQqmYJ6NHTs4SPcmSt69YEU4BUD2VLkiw

chid = 26 8efe03ce609a8c25bc8fb7a82044ec013919242f8f3cab81666224812700d4a4
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Needs too much effort more then guessing 256 bit key 

I tend to agree. For quite some time I've been coming here every now and then to check on any progress and play around with Kangaroos and BitCracks

In the event that I could come up with a solution, I would prefer to keep a low profile. For a while, at least as I devote my attention to resolving the next problem in line - in this case, #125.

But more importantly than 'who did it?', let's not forget, are the fundamentals of this challenge (incorrectly referred to as a puzzle).

These principles should be the basis for all of our efforts, and for all of our discussions here. As stated in the creator's post: "It is simply a crude measuring instrument, of the cracking strength of the community. "

The reference to "community" was interesting in that it could be interpreted as an invitation for more minds to collaborate in order to solve whatever can be solved. This is also hinted at in this line:

"Finally, I wish to express appreciation of the efforts of all developers of new cracking tools and technology."

We could argue that this "community" spirit hinted at by the creator has faded. Not disappeared, but faded.

Almost everyone seems to be in it for their own benefit. This includes the undersigned...

Moreover, the recent resolution of #120 without sharing the good news only heightens a feeling of individualism instead of a sense of community.

Sorry if I offended anyone. This post is intended solely as a reminder of the importance of returning to the basics. For all of us to remember, why was this challenge even started in the first place?

I personally do not believe it was intended to test the overall strength of the blockchain or bitcoin encryption. There are scientists who use very powerful hardware in very advanced laboratories who have been testing encryption challenges for years. And they do not usually visit forums in order to share their findings, primarily due to security concerns.

Just my two cents...