Proof-of-Work Mining Simulator

Interactive demonstration of blockchain mining with adjustable difficulty

How Mining Works:

Set Difficulty: Choose a difficulty level (1-6 leading zeros)
Start Mining: The simulator will search for a valid hash
Find Valid Hash: The nonce increments until a hash with required difficulty is found
Block Reward: When found, the block is mined and statistics are displayed
Adjust & Repeat: Change difficulty to see how it affects mining time

⛏️ Mining Controls

Difficulty Level (Leading Zeros):

leading zeros

📊 Live Mining Status

⚡ Mining Intensity

Current Nonce

Hash Rate

0 H/s

Elapsed Time

🔐 Understanding Proof-of-Work Mining

Proof-of-Work (PoW) is a consensus mechanism where miners must solve a difficult computational puzzle to earn the right to add blocks to the blockchain. The difficulty of the puzzle is adjustable and determines how long mining takes.

What is Difficulty?

Difficulty specifies how many leading zeros a hash must have. More leading zeros = harder puzzle = more hashes needed to find.

Difficulty 1: ~4 leading zero attempts (easy)
Difficulty 2: ~256 leading zero attempts
Difficulty 3: ~4,096 leading zero attempts
Difficulty 6: ~16+ million attempts (hard!)

The Mining Process

Miners repeatedly hash block data with incrementing nonce values until they find a hash meeting the difficulty requirement:

Create block with data + nonce (starting at 0)
Hash the block using SHA-256
Check if hash has required leading zeros
If not, increment nonce and repeat
If yes, block is mined! ✅

Hash Rate

Hash rate measures how many hashes per second (H/s) are computed. Higher hash rate = faster mining, but still needs to find valid hash.

Example: 1,000 H/s means 1,000 attempts per second

💡 Try This: Start with difficulty 2, then increase to 3, 4, 5. Notice how mining time increases exponentially as difficulty increases!

📈 Real-World Difficulty Adjustment

In actual Bitcoin and Ethereum networks, difficulty automatically adjusts to maintain consistent block times:

Bitcoin: Difficulty adjusts every 2,016 blocks (~2 weeks) to target 10-minute block times
Ethereum: Uses dynamic difficulty adjustment to target 15-second block times (before moving to Proof-of-Stake)
Why? As more miners join, hash power increases, so difficulty rises to maintain consistent block production

Network Security: Higher difficulty = more compute power required to attack the network = more secure blockchain!

💰 Mining Economics

In real networks, miners are incentivized to perform the computational work by:

Block Rewards: New cryptocurrency issued for finding valid blocks
Transaction Fees: Fees from transactions included in the block
Cost vs. Reward: Mining is profitable when block rewards exceed electricity and hardware costs

Console Commands Available:

Type these commands in the on-screen console:

mine start [difficulty] - Begin mining at specified difficulty
mine stop - Halt current mining
mine difficulty [n] - Set difficulty (1-6)
mine stats - Show mining statistics
mine reset - Clear current block
mine auto [count] - Auto-mine multiple blocks
rain effect mining - Trigger mining animation

📊 Difficulty Comparison

Difficulty	Leading Zeros	Approximate Attempts	Relative Time
1	1 leading zero	~16	1x
2	2 leading zeros	~256	16x
3	3 leading zeros	~4,096	256x
4	4 leading zeros	~65,536	4,096x
5	5 leading zeros	~1,048,576	65,536x
6	6 leading zeros	~16,777,216	1,048,576x

✅ Mined Blocks History

No blocks mined yet. Start mining to see results!