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SoloBlocks › Block #821,701
← #821,668 #822,737 →
NiceHash EasyMining
Monday, December 18, 2023 · 02:01 UTC · Dec 18, 2023
BLOCK #821,701
🔗 00000000000000000001083bc8296739b4a65f1264f69104a52f16962a24af5b
Total Block Reward
9.1730 BTC
≈ $619,908 USD
Block Height
821,701
in the Bitcoin chain
Found By
NiceHash EasyMining
Solo mining pool
Difficulty
67.3T
network difficulty
Miner Hashrate
183.8 PH/s (est. from 12 blocks)
Large mining farm
Miner Luck
1 in 5,554
per-block odds
Winning Nonce
1,516,914,690
35.32% through search space
Transactions
3,521
1585.4 KB block
Fees Collected
2.9230 BTC
31.86% of reward
Block Interval
27.2 min
36.8% luck (🐢 slow)
🎓 Explain Like I'm 10

Someone spent a small amount of money to rent mining power from NiceHash for a short time. They pointed it at the Bitcoin network solo, hoping to win the lottery.


On Dec 18, 2023, against enormous odds, they hit the jackpot — block #821,701 worth $619,908. The cost of renting that hashrate? A fraction of the reward.

🎲 The Odds — Show Your Work
Miner's share of total Bitcoin hashrate 0.018004%
Miner: 183.8 PH/s vs Network: 1020.75 EH/s
Miner hashrate (Estimated from block frequency (12 blocks found))
183.8 PH/s
Bitcoin network hashrate
1020.75 EH/s
Chance of winning each block
1 in 5,554
Expected wait time at this hashrate
39 days
Expected blocks to find 1 solo block
5,554 blocks
Probability per block = miner_hashrate / network_hashrate
  = 183.8 PH/s / 1020.75 EH/s
  = 1 in 5,554

Expected wait = blocks_to_win × 10 minutes
  = 5,554 × 10 min = 1.3 months
⛏️ Miner Profile
🏗️
Pool
NiceHash EasyMining
Hashrate (24h)
183.8 PH/s (est. from 12 blocks)
Estimated from block frequency (12 blocks found)
Active workers
0
Solo blocks found (tracked)
12 blocks
🏗️
Large mining farm
Thousands of ASICs, industrial power
🎯 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 1,516,914,690 was the winner.
01,516,914,690 ← winner4,294,967,295
35.32%
1,516,914,690
Winning Nonce
35.32%
Through range
2,778,052,605
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 ~0ms.
💸 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 — 6.2500 BTC (68.14%)
Fixed reward, halves every 4 years
Fees — 2.922951 BTC (31.86%)
From 3,521 transactions in this block
6.250 BTC
Subsidy
2.9230 BTC
Tx Fees
83,015 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 — 12 Blocks Found
63.3250
Total BTC earned
$4,279,506
Total USD value
24 days
Avg between finds
#821,668
Dec 17, 2023 · 21:08 UTC · NiceHash EasyMining
8.4370 BTC ≈ $570,172
#821,701THIS BLOCK
Dec 18, 2023 · 02:01 UTC · NiceHash EasyMining
9.1730 BTC ≈ $619,908
⏱ 0 days since previous find
#822,737
Dec 24, 2023 · 14:51 UTC · NiceHash EasyMining
7.1802 BTC ≈ $485,236
⏱ 7 days since previous find
#823,513
Dec 30, 2023 · 04:50 UTC · NiceHash EasyMining
8.1371 BTC ≈ $549,908
⏱ 6 days since previous find
#824,007
Jan 2, 2024 · 12:34 UTC · NiceHash EasyMining
7.3171 BTC ≈ $494,492
⏱ 3 days since previous find
#843,671
May 16, 2024 · 06:51 UTC · NiceHash EasyMining
3.2829 BTC ≈ $221,859
⏱ 135 days since previous find
#845,157
May 26, 2024 · 01:05 UTC · NiceHash EasyMining
3.2310 BTC ≈ $218,354
⏱ 10 days since previous find
#847,193
Jun 9, 2024 · 13:59 UTC · NiceHash EasyMining
3.6882 BTC ≈ $249,251
⏱ 15 days since previous find
#848,279
Jun 17, 2024 · 03:57 UTC · NiceHash EasyMining
3.2823 BTC ≈ $221,819
⏱ 8 days since previous find
#854,822
Jul 31, 2024 · 15:53 UTC · NiceHash EasyMining
3.2717 BTC ≈ $221,101
⏱ 44 days since previous find
#856,360
Aug 11, 2024 · 20:41 UTC · NiceHash EasyMining
3.1508 BTC ≈ $212,932
⏱ 11 days since previous find
#859,384
Sep 1, 2024 · 13:58 UTC · NiceHash EasyMining
3.1736 BTC ≈ $214,473
⏱ 21 days since previous find
📊 At 183.8 PH/s hashrate, statistically expected to find a block every 39 days. Actual average: 24 days. 🍀 Running hot!
✅ 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: ;pa/NiceHash/
📡
Hashrate from Estimated from block frequency (12 blocks found)
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
36.8%
Block Luck
😤 Unlucky
Time since prev block
27.2 min
Expected (10 min avg)
600 sec
Luck score
36.8% ↓
💡 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 #821,701
December 18, 2023 · 02:01 UTC
Reward9.1730 BTC
Value$619,908
PoolNiceHash EasyMining
Winning Nonce1,516,914,690
Nonce Position35.32% of range
Transactions3,521
Fees Captured2.9230 BTC
SOLOBLOCKS.IO · Bitcoin Solo Mining Tracker
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