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SoloBlocks › Block #903,883
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CKPool Solo
Thursday, July 3, 2025 · 21:37 UTC · Jul 3, 2025
BLOCK #903,883
🔗 000000000000000000004c918a929cb2710b5376dcdd89e719c521dc5255115c
Total Block Reward
3.1726 BTC
≈ $269,674 USD
Block Height
903,883
in the Bitcoin chain
Found By
CKPool Solo
Solo mining pool
Difficulty
117.0T
network difficulty
Miner Hashrate
596K
Unknown device
Miner Luck
unknown
per-block odds
Winning Nonce
3,108,892,256
72.38% through search space
Transactions
3,949
1530 KB block
Fees Collected
0.0476 BTC
1.5% of reward
Block Interval
26.3 min
38.1% luck (🐢 slow)
🎓 Explain Like I'm 10

Bitcoin mining is a giant lottery. Every ~10 minutes, one miner wins 3.1726 Bitcoin — worth $269,674 today.


On Jul 3, 2025, this miner using mining hardware found block #903,883. They were mining alone — no big pool, just their own machines competing directly against the entire Bitcoin network (1020.75 EH/s total).


Winning solo means keeping 100% of the reward — no pool fees, no sharing. High risk, high reward.

🎲 The Odds — Show Your Work

Hashrate unknown for this miner — odds cannot be calculated. They found a single block; their true hashrate is a mystery.

⛏️ Miner Profile
⛏️
Pool
CKPool Solo
Hashrate (24h)
596K
CKPool Solo live API
Active workers
0
Solo blocks found (tracked)
1 block
🎯 The Winning Number — Nonce Visualizer
To mine a block, the miner cycles through numbers from 0 to 4,294,967,295 at billions per second, checking if each produces a valid hash. Number 3,108,892,256 was the winner.
03,108,892,256 ← winner4,294,967,295
72.38%
3,108,892,256
Winning Nonce
72.38%
Through range
1,186,075,039
Numbers after
💡 The miner also tried different extra nonce values — restarting from 0 each time the full 4.29B range was exhausted. Modern ASICs can cycle through the entire nonce space in ~4294967.3ms.
💸 Fee Breakdown — What the Miner Captured
The block reward has two parts: a fixed subsidy set by Bitcoin protocol, plus transaction fees paid by users who wanted their transactions included.
Subsidy — 3.1250 BTC (98.5%)
Fixed reward, halves every 4 years
Fees — 0.047634 BTC (1.5%)
From 3,949 transactions in this block
3.125 BTC
Subsidy
0.0476 BTC
Tx Fees
1,206 sat
Avg fee/tx
⚡ Solo miners keep 100% of fees — no pool takes a cut. In pool mining, the fee revenue is also split among all pool members.
🏆 Miner Block History — 1 Block Found
#903,883THIS BLOCK
Jul 3, 2025 · 21:37 UTC · CKPool Solo
3.1726 BTC ≈ $269,674
✅ Verify This Block
mempool.space
Full block details, transactions, fee rate
→
blockstream.info
Independent block explorer
→
blockchain.com
Alternative verification source
→
Miner's wallet
All transactions for this address
→
🔍 How We Know This
⛓️
Block is on the Bitcoin blockchain
The block hash starts with many zeros — proof of work that cannot be faked. It's in Bitcoin's immutable history forever.
🏷️
Pool identified from coinbase tag
The coinbase transaction contains a text signature: fhVQ_h9ckpooleu/solo.ckpool.org/
📡
Hashrate from CKPool Solo live API
We query the pool's public API using the miner's wallet address to get their actual submitted hashrate.
❓ What is Solo Mining?

In pool mining, thousands of miners work together and split the reward every time they find a block.


In solo mining, you work alone. You keep 100% of the reward — but you might go years without finding anything.


The Bitcoin network produces ~52,560 blocks per year. Each block currently pays 3.125 BTC.


Every solo block is proof that small miners can still win. 🎉

⏱ Block Timing & Luck
38.1%
Block Luck
😤 Unlucky
Time since prev block
26.3 min
Expected (10 min avg)
600 sec
Luck score
38.1% ↓
💡 Slow block — the network took longer than average. This miner kept hashing through a tough stretch. Luck > 100% means a faster-than-expected find.
🎖 Block Certificate
⚡ Solo Block Certificate
BLOCK #903,883
July 3, 2025 · 21:37 UTC
Reward3.1726 BTC
Value$269,674
PoolCKPool Solo
Winning Nonce3,108,892,256
Nonce Position72.38% of range
Transactions3,949
Fees Captured0.0476 BTC
SOLOBLOCKS.IO · Bitcoin Solo Mining Tracker
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