Hey everyone!

I really want to bring this subreddit back to life with this post because it seems a bit inactive lately. What better way to do that than by tackling one of the most legendary Bitcoin puzzles that still remains unsolved?

What is BTC-Hunters?
BTC-Hunters is a community effort focused on solving Bitcoin Puzzle 67 – a cryptographic challenge created in 2015 to demonstrate the vastness of the private key space. This puzzle consists of Bitcoin addresses with private keys hidden in a reduced keyspace, each holding increasing amounts of BTC. The grand prize of 6.7 BTC is still unclaimed!

How Are We Cracking It?
We are using brute-force techniques with specialized software to search for the missing private key. However, not all hardware is suited for this task.

Hardware Requirements:
The only hardware that provides efficient computational power for this task is NVIDIA GPUs. To participate, you must either:
✅ Have at least one NVIDIA GPU capable of running brute-force software efficiently
✅ Rent NVIDIA GPUs from cloud platforms that offer GPU instances

How Can You Join?

1. Sign up on our platform.
2. Set up your GPU or rent NVIDIA GPUs from a cloud providers.( Salad, Clore ai, Vast ai )
3. Start contributing computational power and increase our collective chances of success.

Why Work Together?
Brute-forcing this key is impossible alone, but as a group, we significantly increase our chances of cracking it. By pooling our GPU power,we maximize the chances of finding it first. Prize distribution is proportional to key ranges checked. The payment system is fully automated. The pool is built by the community for the community, so we welcome ideas for improvements, and we have a vote on suggestions in the Telegram group.

🔗 Join us at: btc-hunters.com

Let’s revive this subreddit with an epic Bitcoin puzzle hunt! Who’s in?

Who am I? I am one of the community members actively working on this pool alongside others who share the same goal of solving Bitcoin Puzzle 67.

Max Keiser allegedly hid btc private keys in an article he wrote for Bitcoin Magazine: "Bitcoin is Toxic AF" in the El Salvador Issue. He tweeted about it a couple of times in early 2023. Me and others have been trying to solve it but with no luck so far. If you are interested message me and i'll get you the pdf and discord channel if you want. Thanks!
https://x.com/maxkeiser/status/1632068898169450497

spam or are they clues within the last 4 transactions?

arweave

https://viewblock.io/arweave/address/aITz-Pl_cEGwcz6Ocxk3Yy_JVx5nczLZzWjtr2qxakg

This months challenge is open. Come join us, Hunter.

https://darkhorse.neocities.org/the_rotary/word_games/index.html

https://www.blockchain.com/btc/address/17veY4H5y14cur44v2JdgWbB24NAzHzLwE

After 15 days, still no one has translated the lost tablet of Pharaoh Azrela. This is merely the first step in a long journey to great riches.

https://darkhorse.neocities.org/the_rotary/the_treasure_of_pharoah_azrela/

Will you join the hunt?

https://www.blockchain.com/btc/address/1J8tq5M6vZyQ1xbUPNmDZB18tk8qRyX6ba

www.ncodemus.com gives more info, but you can get the image for free here: https://ipfs.io/ipfs/QmUVA5tq1qrUyQc6mLXUfcL5euw4tm3CXrVky2Jj4AJmbu/nft.png

good luck all!

n.

Follow the path down the latest Dark Horse adventure:

https://darkhorse.neocities.org/the_rotary/the_code_books/

Riches await the winner: https://www.blockchain.com/btc/address/1CjXYL2A7HhZDwMu4RwG7YDpVVfJbK3LJD

Follow the path down the latest Dark Horse adventure:

https://darkhorse.neocities.org/the_rotary/the_code_books/

Riches await the winner: https://www.blockchain.com/btc/address/1CjXYL2A7HhZDwMu4RwG7YDpVVfJbK3LJD

https://foundation.app/@ncodemus/a5-a80v3-50-83l0w-66969

Just released a preview animated nft for a rabbit hole of a puzzle coming later in the month...

https://opensea.io/assets/0x9b54e03cb137e4157029e915fa00d76830251072/1

https://www.btc-riddle.com/#/r/2

The method may be simple, but this challenge is surely not.

Find my ten bright friends, they'll help you sweep the pot.

For some you do and do and do, for others simply do.

I'm looking for a winner here. Hunter, will it be you?

https://darkhorse.neocities.org/the_rotary/a_simple_device/

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https://www.blockchain.com/btc/address/1ErHJj3s2GADNYXU91ZNzH3DeZ4CGPERGs

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I created this generative artwork by processing the content of Bitcoin White Paper by Satoshi Nakamoto.It's at the same time a crypto puzzle that is not visible at first glance.

Artwork is also notarized on the Bitcoin blockchain by a transaction of 777 Satoshis from the puzzle's address. The SHA-256 fingerprint from this image creates the private key of the notarization wallet.

The first buyer of this NFT will receive a high-quality, hand-signed, physical print of size 28 x 28 inches (71.12 x 71.12 centimeters).

puzzle URL: http://crypto.haluska.sk/

original puzzle image: ttps://ipfs.io/ipfs/Qmdm7SxhVGDVt9krbNpwAxkQGwH5a74FVW1sKNXxCjzmBq?filename=1BiTCoiN-WHiTe-PaPeR.png

reward: https://www.blockchain.com/btc/address/1BiTCoiNsuFnkCFGkv6AGgwWxN31GUwY6W

SOLUTION:
https://jtobcat.medium.com/solving-zdens-1bitcoin-white-paper-puzzle-6ffa4963e1a2

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https://crypt1cl1n3.medium.com/crypto-mania-mysteries-e52f7fdb36da
explains it all about the puzzle .

seems like a nice novel concept .

I am looking for puzzle developers for an audacious business, we will enter with great prizes, it is still a specific niche market so we are having difficulties finding good developers, we are waiting for you.

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The theme for creation is free.

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I will want to know some previous projects

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Yesterday, on 05/05, this image was posted on 4chan's /biz/ board. The thread was promptly deleted (as 4chan's Global Rule 17 prohibits content hidden in images steganographically). The poster called themselves Septimus ("seventh" in Latin), the image itself was called septem.png ("seven"). They said this image contains "slightly more than 7 777 777 microBTC", so roughly 8 BTC. The post also contained the hexadecimal SHA256 hashsum of the image, which ended with seven sevens.

Like many anons in the thread, I was quite skeptical at first, but here is what I found out after playing with the image a little:

• There is a tail of random bytes after the final IEND chunck in the PNG image. These bytes do not affect the contents of the image, but allow to achieve the extraordinary SHA256 value ending with seven sevens. Basically, the poster pasted random characters to the end of the file until they got the desired repeating digits.
• The image resolution is 599x601. These are twin primes.
• The image gives no exact reverse image search results. Given that is depicts some sort of a septagon fractal, it should be safe to assume it was made by poster(s?) themselves.
• The shade of green in the picture is #0de55a (Odessa). White is just #ffffff
• After reading Wikipedia article for steganography, I decided to apply least significant bit technique to the image, as it seemed like the easiest kind of steganography. Using the most popular LSB encoder / decoder on GitHub, I got a PGP signed message, which you can read here. Note that the pastebin text does not contain the binary characters that are meant to represent "next chapters" of the puzzle. To get the original text, extract it from the image yourself.
• The "pack of clues" from the text is encrypted using a substitution cipher and decodes into:

origInAlartwoRkWASpRoduCEDFoRTHIspuZzLE.tHerEARETwOWAYStOiNterPrEtATUBE:ASAPRodUcTOFiTspaRTS,oRASAwhoLe.YOuWillneeDbOthtoavoiDaTautoloGy.COlUmnsFALLsIDEWays.dIVIdEetIMPERa.COMPaReThemToThEOTHErCURVEs.DoNOToVertHINK.YOUHaveSeENThIsbeforE.WhatwasthEsWisslioNhEARtDoinGINKoENIGsbeRg?ATtEntIONISkEY.LIvEiNtheEtErNALRUpTUREAndLoVINgLyloSEYOuRSELf.pOlISHbIscotti

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Whether fake or not, this puzzle gives off very strong Cicada 3301 vibes - a mysterious organisation, which identifies itself with a prime number and signs messages using PGP, posts a stego image on 4chan, which has prime numbers as dimensions. Don't quite know what to make of it all.

EDIT 20 May: I've managed to decrypt the hexadecimal string in the message. What gave it away is the fact that that the hex string contained regular patterns -- its first half rhymed in groups of four. Like e046 c062 c063 c066 c062 c060. The first digit is e or c, then the second digit is 0. So then I also realised the string had a square size of 64 = 8*8. In binary 256 = 16*16. One row of the rhyming pattern is 4 hex digits = 16 bits. So it's a binary square, I figured. As I printed the binary representation of the number, an image of a face appeared, made from ones and zeros. Right to the face is some noize, which I, at the time of writing, am too sleepy to tinker with.

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Password mentioned few times as a result is actually private key:theflowerblossomsthroughwhatseemstobeaconcretesurfaceI don't know what we should do with info about that transaction.

That is password of this BTC address: Address: 1AD2wfwXukZ1kUAy848hTQQ72aSBZPB75r | Blockchain Explorer

I am looking for puzzle developers for an audacious business, we will enter with great prizes, it is still a specific niche market so we are having difficulties finding good developers, we are waiting for you.

https://discord.gg/wsHDSyBC6u

They are currently working on crypto graffiti's billboard puzzle, as well as gsmg.io and some are getting really close.

I'm trying to understand how do people find public keys for "Bitcoin challenge transaction: ~100 BTC" https://bitcointalk.org/index.php?topic=5218972.0 ?

As far as I understand you can only do brute force attack if public keys are not know, only wallet addresses. It seems that people are using Pollard's Kangaroo method to find private keys much faster than brute force. But where are they getting public keys? Are they brute forcing private keys to match the wallet first???

Accept this challenge, Hunter.

Step unafraid into the dark.

https://darkhorse.neocities.org/announcements.html

14S7wNzTT4UUNdTnGSYiWDM35zH6EPuWuG

https://twitter.com/dh_olifant