Bitcoin puzzle transaction ~32 BTC prize to who solves it

[oddstake]

If you can spend that much, throwing it all on CPU is honestly a waste.
Even the fastest EPYC setups are way behind GPUs in raw keyrate for secp256k1.
A single RTX 5090 will crush any 192-core CPU in keys/sec, and for less power and less cash.
Unless you’re doing something highly specialized on CPU, brute-forcing with GPU is just smarter. 😄

I tried on some low keys puzzles with /Etayson/BSGS-cuda and my RTX 4080 is slower at sequential search than a single EPYC with 64 cores and bloom filter of about 1T in size.
Indeed, RCKangaroo or any other Kangaroos out there are faster but on puzzles beyond 135 things get complicated.

[nomachine]

This Python script generates a fully signed raw Bitcoin transaction that can be used with the MARA Slipstream service (or any other broadcast method).

Automatically:
Fetches UTXOs (unspent outputs) from mempool.space

Code:

import base58
import requests
import ecdsa
from bitcoin import *
import hashlib

def decode_wif(wif):
    b = base58.b58decode(wif)
    if len(b) == 38 and b[-5] == 0x01:
        return b[1:-5], True  # compressed 
    elif len(b) == 37:
        return b[1:-1], False  # uncompressed
    raise ValueError("Invalid WIF format")

def get_pubkey(priv_bytes, compressed=True): 
    sk = ecdsa.SigningKey.from_string(priv_bytes, curve=ecdsa.SECP256k1)
    vk = sk.get_verifying_key()
    x = vk.pubkey.point.x()
    y = vk.pubkey.point.y()
    return ('02' if y % 2 == 0 else '03') + f"{x:064x}"  # Always compressed

def get_address(pubkey):
    pubkey_bytes = bytes.fromhex(pubkey)
    pubkey_hash = hash160(pubkey_bytes)
    return pubkey_to_address(pubkey)  # Always compressed P2PKH

def is_legacy_address(address):
    return address.startswith('1')

def fetch_utxos(address):
    if not is_legacy_address(address):
        raise ValueError("Only legacy addresses (starting with '1') are supported")
    
    try:
        url = f"https://mempool.space/api/address/{address}/utxo"
        r = requests.get(url)
        r.raise_for_status()
        return r.json()
    except Exception as e:
        print("Failed to fetch UTXOs:", e)
        return []

def estimate_fee(num_inputs, num_outputs, fee_rate):
    # Legacy transaction size estimation with compressed pubkeys
    input_size = 148  # Standard for P2PKH with compressed pubkey
    output_size = 34   # P2PKH output size
    total_size = 10 + num_inputs * input_size + num_outputs * output_size
    return total_size * fee_rate

def create_transaction(wif, to_address, amount_btc, fee_rate):
    # Validate addresses are legacy
    if not is_legacy_address(to_address):
        raise ValueError("Only legacy addresses (starting with '1') are supported for recipient")
    
    priv_bytes, _ = decode_wif(wif)  
    pubkey = get_pubkey(priv_bytes)
    from_address = get_address(pubkey)
    
    if not is_legacy_address(from_address):
        raise ValueError("Only legacy addresses (starting with '1') are supported for sender")

    utxos = fetch_utxos(from_address)
    if not utxos:
        raise RuntimeError("No UTXOs available")

    # Sort UTXOs by value (descending) to minimize number of inputs
    utxos.sort(key=lambda x: x['value'], reverse=True)

    inputs = []
    total = 0
    for utxo in utxos:
        inputs.append({'output': f"{utxo['txid']}:{utxo['vout']}", 'value': utxo['value']})
        total += utxo['value']
        if total >= int(amount_btc * 1e8) + estimate_fee(len(inputs), 2, fee_rate):
            break  # We have enough including fees

    if total == 0:
        raise RuntimeError("No UTXOs available")

    send_amount = int(amount_btc * 1e8)
    fee = estimate_fee(len(inputs), 2, fee_rate)

    if total < send_amount + fee:
        raise RuntimeError(f"Insufficient funds. Need {send_amount + fee} satoshis, have {total}")

    change = total - send_amount - fee
    outputs = [{'address': to_address, 'value': send_amount}]
    if change > 546:  # Minimum dust amount
        outputs.append({'address': from_address, 'value': change})
    elif change > 0:
        fee += change  # Add remaining change to fee if it's too small

    tx = mktx(inputs, outputs)
    for i in range(len(inputs)):
        tx = sign(tx, i, wif)
    return tx

# === Example Usage ===
if __name__ == "__main__":
    WIF = "<wif_private_key>"
    TO_ADDRESS = "1YourLegacyAddressHere"  # must start with '1'
    AMOUNT_BTC = 6.70013241
    FEE_RATE = 20  # sats/vB

    try:
        raw_tx = create_transaction(WIF, TO_ADDRESS, AMOUNT_BTC, FEE_RATE)
        print("Raw Transaction:", raw_tx)
        
        # To broadcast the transaction (uncomment to use)
        # broadcast_url = "https://mempool.space/api/tx"
        # response = requests.post(broadcast_url, data=raw_tx)
        # print("Broadcast response:", response.text)
    except Exception as e:
        print("Error:", e)

Example script output

Raw Transaction: 0100000002b3138da741af259146ca2c4895bac7e0c08147679f88ce3302fb4db0584bf31205000 0006b4830450221009131a350b98aab71d77f5a9a94dd5bac9a5602e2b761a2dc605ba03cb996df ff0220480b53128af0cf7c9b74fa8d625e2a9d143d15fdaa2fd24e421d4d0d29c1532201210279b e667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798ffffffff6441384445 a0f426ee689e2532e41fc6947dda41558026b80f5b1dfd7c58455d130000006a473044022032ccf 651486b1055ea188d95645dc61329e9fa89a18b33417d33dc0aa61484d602206bbb8e8cf1b2a6e8 ea64f78f7d7625d05014f593c76438c7127d5e2b147d971601210279be667ef9dcbbac55a06295c e870b07029bfcdb2dce28d959f2815b16f81798ffffffff023997ef27000000001976a914751e76 e8199196d454941c45d1b3a323f1433bd688acafb2f501000000001976a914f6f5431d25bbf7b12 e8add9af5e3475c44a0a5b888ac00000000

Cheers

[Akito S. M. Hosana]

Cheers

There's just one thing left. How do I get the WIF from puzzle 71?  

[fecell]

Cheers

There's just one thing left. How do I get the WIF from puzzle 71?  

it's easy. 

[fecell]

i'v got

Speed: 3078.09 points*/ms

*) "point" is a three values: kG, +sG, -sG, at same one ms.

with 1650ti/4gb.
its a normal or slow result?
(cuda12.9/c++20/win64)

[_AFK_]

true i few GeForce RTX 5090  will do the job for much less, the h200 is for Ai task using 4 RTX 5090  i can achieve  1_382_400_000_000_000  x day

for now i try few gpu

NVIDIA RTX A4000   818.15 MKey/s

GeForce RTX 5060 Ti  973.68 MKey/s

GeForce RTX 3080  1574.46

GeForce RTX 3060  656.09 MKey/s

GeForce RTX 3090 1324.28 MKey/s

GeForce RTX 4090   3061.96 MKey/s

GeForce RTX 4070 1286.45 MKey/s

GeForce RTX 5080  1988.08 MKey/s

GeForce RTX 3070  1014.12 MKey/s

NVIDIA RTX A5000  1338.56 MKey/s

GeForce RTX 5090  3956.87 MKey/s  top

GeForce RTX 4080 SUPER 1725.58 MKey/s

GeForce GTX 1070 119.88 MKey/s

NVIDIA H200 NVL  2871.53 MKey/s


any way to cut the key or skip consecutive number and letter smart way?

Well, those values are not correct.

I'm using a 5080 and i guarantee i have 2.5x faster speed and the GPU is limited to only use 70%. If i use it 100% power it will achieve 3.5x faster speed but as long as we go, it will decrease speed because of temperature.

I'm getting around 4.7/4.8 Gk/s (4700 Mk/s) on my rtx 5080 as you can see below.

PUZZLE: #71 - BALANCE:  7.10015251 BTC

OPTIMIZED RANDOM POINT: 6e30e2630000000000 [UNBIASED]
HEX: 6e30e2630000000000 >>> 6e30e263ffffffffff
DEC: 2032664334818258976768 >>> 2032664335917770604543
SEARCHING FOR PREFIX: "1PWo3JeB9jrGwf" - [COMPRESSED]

START TIME: 05/08/2025 - 09:34:53

DIFFICULTY: [2^40.00] - SEARCHING A TOTAL OF "1,099,511,627,775" KEYS
BLOOM FILTER: INITIALIZED WITH 1 PREFIX
DEVICE INFO: GPU 0 - NVIDIA GeForce RTX 5080 (15.92 GB), CUs: 84, CAP: 12.0, PCI: 1, L2 SIZE: 65536 KB
CUDA DEVICES: 1 - CUDA DRIVER/RUNTIME: 12.9/12.9

SPEED: [4.7 GK/s] - SEARCH: [2^34.58 - 2.34%] - RUN: [00:00:05] - END: [00:03:57] - TOTAL:

Let's continue this funny game, good luck all!

[Tony8989]

true as told before bro im using  bitcrack, but  i try different GitHub project and i could achieve more fast,but the issue is some project skip the key and to stay safe i stick with bitcrack  what GitHub are you using thank you

[_AFK_]

true as told before bro im using  bitcrack, but  i try different GitHub project and i could achieve more fast,but the issue is some project skip the key and to stay safe i stick with bitcrack  what GitHub are you using thank you

None.

Custom coded.

[onepuzzle]

This Python script generates a fully signed raw Bitcoin transaction that can be used with the MARA Slipstream service (or any other broadcast method).

Automatically:
Fetches UTXOs (unspent outputs) from mempool.space

Code:

import base58
import requests
import ecdsa
from bitcoin import *
import hashlib

def decode_wif(wif):
    b = base58.b58decode(wif)
    if len(b) == 38 and b[-5] == 0x01:
        return b[1:-5], True  # compressed 
    elif len(b) == 37:
        return b[1:-1], False  # uncompressed
    raise ValueError("Invalid WIF format")

def get_pubkey(priv_bytes, compressed=True): 
    sk = ecdsa.SigningKey.from_string(priv_bytes, curve=ecdsa.SECP256k1)
    vk = sk.get_verifying_key()
    x = vk.pubkey.point.x()
    y = vk.pubkey.point.y()
    return ('02' if y % 2 == 0 else '03') + f"{x:064x}"  # Always compressed

def get_address(pubkey):
    pubkey_bytes = bytes.fromhex(pubkey)
    pubkey_hash = hash160(pubkey_bytes)
    return pubkey_to_address(pubkey)  # Always compressed P2PKH

def is_legacy_address(address):
    return address.startswith('1')

def fetch_utxos(address):
    if not is_legacy_address(address):
        raise ValueError("Only legacy addresses (starting with '1') are supported")
    
    try:
        url = f"https://mempool.space/api/address/{address}/utxo"
        r = requests.get(url)
        r.raise_for_status()
        return r.json()
    except Exception as e:
        print("Failed to fetch UTXOs:", e)
        return []

def estimate_fee(num_inputs, num_outputs, fee_rate):
    # Legacy transaction size estimation with compressed pubkeys
    input_size = 148  # Standard for P2PKH with compressed pubkey
    output_size = 34   # P2PKH output size
    total_size = 10 + num_inputs * input_size + num_outputs * output_size
    return total_size * fee_rate

def create_transaction(wif, to_address, amount_btc, fee_rate):
    # Validate addresses are legacy
    if not is_legacy_address(to_address):
        raise ValueError("Only legacy addresses (starting with '1') are supported for recipient")
    
    priv_bytes, _ = decode_wif(wif)  
    pubkey = get_pubkey(priv_bytes)
    from_address = get_address(pubkey)
    
    if not is_legacy_address(from_address):
        raise ValueError("Only legacy addresses (starting with '1') are supported for sender")

    utxos = fetch_utxos(from_address)
    if not utxos:
        raise RuntimeError("No UTXOs available")

    # Sort UTXOs by value (descending) to minimize number of inputs
    utxos.sort(key=lambda x: x['value'], reverse=True)

    inputs = []
    total = 0
    for utxo in utxos:
        inputs.append({'output': f"{utxo['txid']}:{utxo['vout']}", 'value': utxo['value']})
        total += utxo['value']
        if total >= int(amount_btc * 1e8) + estimate_fee(len(inputs), 2, fee_rate):
            break  # We have enough including fees

    if total == 0:
        raise RuntimeError("No UTXOs available")

    send_amount = int(amount_btc * 1e8)
    fee = estimate_fee(len(inputs), 2, fee_rate)

    if total < send_amount + fee:
        raise RuntimeError(f"Insufficient funds. Need {send_amount + fee} satoshis, have {total}")

    change = total - send_amount - fee
    outputs = [{'address': to_address, 'value': send_amount}]
    if change > 546:  # Minimum dust amount
        outputs.append({'address': from_address, 'value': change})
    elif change > 0:
        fee += change  # Add remaining change to fee if it's too small

    tx = mktx(inputs, outputs)
    for i in range(len(inputs)):
        tx = sign(tx, i, wif)
    return tx

# === Example Usage ===
if __name__ == "__main__":
    WIF = "<wif_private_key>"
    TO_ADDRESS = "1YourLegacyAddressHere"  # must start with '1'
    AMOUNT_BTC = 6.70013241
    FEE_RATE = 20  # sats/vB

    try:
        raw_tx = create_transaction(WIF, TO_ADDRESS, AMOUNT_BTC, FEE_RATE)
        print("Raw Transaction:", raw_tx)
        
        # To broadcast the transaction (uncomment to use)
        # broadcast_url = "https://mempool.space/api/tx"
        # response = requests.post(broadcast_url, data=raw_tx)
        # print("Broadcast response:", response.text)
    except Exception as e:
        print("Error:", e)

Example script output

Raw Transaction: 0100000002b3138da741af259146ca2c4895bac7e0c08147679f88ce3302fb4db0584bf31205000 0006b4830450221009131a350b98aab71d77f5a9a94dd5bac9a5602e2b761a2dc605ba03cb996df ff0220480b53128af0cf7c9b74fa8d625e2a9d143d15fdaa2fd24e421d4d0d29c1532201210279b e667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798ffffffff6441384445 a0f426ee689e2532e41fc6947dda41558026b80f5b1dfd7c58455d130000006a473044022032ccf 651486b1055ea188d95645dc61329e9fa89a18b33417d33dc0aa61484d602206bbb8e8cf1b2a6e8 ea64f78f7d7625d05014f593c76438c7127d5e2b147d971601210279be667ef9dcbbac55a06295c e870b07029bfcdb2dce28d959f2815b16f81798ffffffff023997ef27000000001976a914751e76 e8199196d454941c45d1b3a323f1433bd688acafb2f501000000001976a914f6f5431d25bbf7b12 e8add9af5e3475c44a0a5b888ac00000000

Cheers

You don't have to reinvent the wheel.

https://github.com/onepuzzle/btc-transaction

[Menowa*]

This Python script generates a fully signed raw Bitcoin transaction that can be used with the MARA Slipstream service (or any other broadcast method).

Automatically:
Fetches UTXOs (unspent outputs) from mempool.space

Code:

import base58
import requests
import ecdsa
from bitcoin import *
import hashlib

def decode_wif(wif):
    b = base58.b58decode(wif)
    if len(b) == 38 and b[-5] == 0x01:
        return b[1:-5], True  # compressed 
    elif len(b) == 37:
        return b[1:-1], False  # uncompressed
    raise ValueError("Invalid WIF format")

def get_pubkey(priv_bytes, compressed=True): 
    sk = ecdsa.SigningKey.from_string(priv_bytes, curve=ecdsa.SECP256k1)
    vk = sk.get_verifying_key()
    x = vk.pubkey.point.x()
    y = vk.pubkey.point.y()
    return ('02' if y % 2 == 0 else '03') + f"{x:064x}"  # Always compressed

def get_address(pubkey):
    pubkey_bytes = bytes.fromhex(pubkey)
    pubkey_hash = hash160(pubkey_bytes)
    return pubkey_to_address(pubkey)  # Always compressed P2PKH

def is_legacy_address(address):
    return address.startswith('1')

def fetch_utxos(address):
    if not is_legacy_address(address):
        raise ValueError("Only legacy addresses (starting with '1') are supported")
    
    try:
        url = f"https://mempool.space/api/address/{address}/utxo"
        r = requests.get(url)
        r.raise_for_status()
        return r.json()
    except Exception as e:
        print("Failed to fetch UTXOs:", e)
        return []

def estimate_fee(num_inputs, num_outputs, fee_rate):
    # Legacy transaction size estimation with compressed pubkeys
    input_size = 148  # Standard for P2PKH with compressed pubkey
    output_size = 34   # P2PKH output size
    total_size = 10 + num_inputs * input_size + num_outputs * output_size
    return total_size * fee_rate

def create_transaction(wif, to_address, amount_btc, fee_rate):
    # Validate addresses are legacy
    if not is_legacy_address(to_address):
        raise ValueError("Only legacy addresses (starting with '1') are supported for recipient")
    
    priv_bytes, _ = decode_wif(wif)  
    pubkey = get_pubkey(priv_bytes)
    from_address = get_address(pubkey)
    
    if not is_legacy_address(from_address):
        raise ValueError("Only legacy addresses (starting with '1') are supported for sender")

    utxos = fetch_utxos(from_address)
    if not utxos:
        raise RuntimeError("No UTXOs available")

    # Sort UTXOs by value (descending) to minimize number of inputs
    utxos.sort(key=lambda x: x['value'], reverse=True)

    inputs = []
    total = 0
    for utxo in utxos:
        inputs.append({'output': f"{utxo['txid']}:{utxo['vout']}", 'value': utxo['value']})
        total += utxo['value']
        if total >= int(amount_btc * 1e8) + estimate_fee(len(inputs), 2, fee_rate):
            break  # We have enough including fees

    if total == 0:
        raise RuntimeError("No UTXOs available")

    send_amount = int(amount_btc * 1e8)
    fee = estimate_fee(len(inputs), 2, fee_rate)

    if total < send_amount + fee:
        raise RuntimeError(f"Insufficient funds. Need {send_amount + fee} satoshis, have {total}")

    change = total - send_amount - fee
    outputs = [{'address': to_address, 'value': send_amount}]
    if change > 546:  # Minimum dust amount
        outputs.append({'address': from_address, 'value': change})
    elif change > 0:
        fee += change  # Add remaining change to fee if it's too small

    tx = mktx(inputs, outputs)
    for i in range(len(inputs)):
        tx = sign(tx, i, wif)
    return tx

# === Example Usage ===
if __name__ == "__main__":
    WIF = "<wif_private_key>"
    TO_ADDRESS = "1YourLegacyAddressHere"  # must start with '1'
    AMOUNT_BTC = 6.70013241
    FEE_RATE = 20  # sats/vB

    try:
        raw_tx = create_transaction(WIF, TO_ADDRESS, AMOUNT_BTC, FEE_RATE)
        print("Raw Transaction:", raw_tx)
        
        # To broadcast the transaction (uncomment to use)
        # broadcast_url = "https://mempool.space/api/tx"
        # response = requests.post(broadcast_url, data=raw_tx)
        # print("Broadcast response:", response.text)
    except Exception as e:
        print("Error:", e)

Example script output

Raw Transaction: 0100000002b3138da741af259146ca2c4895bac7e0c08147679f88ce3302fb4db0584bf31205000 0006b4830450221009131a350b98aab71d77f5a9a94dd5bac9a5602e2b761a2dc605ba03cb996df ff0220480b53128af0cf7c9b74fa8d625e2a9d143d15fdaa2fd24e421d4d0d29c1532201210279b e667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798ffffffff6441384445 a0f426ee689e2532e41fc6947dda41558026b80f5b1dfd7c58455d130000006a473044022032ccf 651486b1055ea188d95645dc61329e9fa89a18b33417d33dc0aa61484d602206bbb8e8cf1b2a6e8 ea64f78f7d7625d05014f593c76438c7127d5e2b147d971601210279be667ef9dcbbac55a06295c e870b07029bfcdb2dce28d959f2815b16f81798ffffffff023997ef27000000001976a914751e76 e8199196d454941c45d1b3a323f1433bd688acafb2f501000000001976a914f6f5431d25bbf7b12 e8add9af5e3475c44a0a5b888ac00000000

Cheers

Did u test it? Do you have a example that it worked out?

Cheers

There's just one thing left. How do I get the WIF from puzzle 71?  

I accidentally found it when i was typing  18 random numbers, i will send you so you can be happy

[onepuzzle]

Cheers

There's just one thing left. How do I get the WIF from puzzle 71?  

I accidentally found it when i was typing  18 random numbers, i will send you so you can be happy

What are you talking about?

[Akito S. M. Hosana]

Cheers

There's just one thing left. How do I get the WIF from puzzle 71?  

I accidentally found it when i was typing  18 random numbers, i will send you so you can be happy

That’s like sneezing and solving a Rubik’s Cube mid-sneeze! 

[Tony8989]

Guys any GitHub project able to use rig or multiple GPU please thank you

[neoman602]

https://github.com/puzzleman22/bitcoin_puzzle_transformation - a project that uses transformations to find bitcoin puzzles

[Menowa*]

Cheers

There's just one thing left. How do I get the WIF from puzzle 71?  

I accidentally found it when i was typing  18 random numbers, i will send you so you can be happy

That’s like sneezing and solving a Rubik’s Cube mid-sneeze! 

I can solve it, but not mid-sneeze Hope to find 71 wif

[analyticnomad]

Cheers

There's just one thing left. How do I get the WIF from puzzle 71?  

I accidentally found it when i was typing  18 random numbers, i will send you so you can be happy

That’s like sneezing and solving a Rubik’s Cube mid-sneeze! 

Its more like a Rubik's Cube sneezing and solving you mid-sneeze

[neoman602]

https://github.com/puzzleman22/Bitcoin-Puzzle-Range-Reducer - try this one guys

it scans the last 5 hex in an instant

[MrGPBit]

https://github.com/puzzleman22/Bitcoin-Puzzle-Range-Reducer - try this one guys

it scans the last 5 hex in an instant

but the random numbers run on the cpu and in every second only 1 range value

[neoman602]

https://github.com/puzzleman22/Bitcoin-Puzzle-Range-Reducer - try this one guys

it scans the last 5 hex in an instant

but the random numbers run on the cpu and in every second only 1 range value

set maximum power 256 blocks on 256 threads it will fly

[MrGPBit]

https://github.com/puzzleman22/Bitcoin-Puzzle-Range-Reducer - try this one guys

it scans the last 5 hex in an instant

but the random numbers run on the cpu and in every second only 1 range value

set maximum power 256 blocks on 256 threads it will fly

That doesn't work. There are too many blocks and threads for the graphics card. Only enter the number of blocks and threads that the graphics card supports, otherwise it won't find the key. You need to know that!