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Block #467,724

TWNLength 10β˜…β˜…β˜†β˜†β˜†

Bi-Twin Chain Β· Discovered 3/31/2014, 12:04:35 AM Β· Difficulty 10.4346 Β· 6,370,074 confirmations

TWN
Bi-Twin Chain

Interleaved pairs of primes that differ by 2, forming twin prime pairs at each level.

Block Header
Block Hash
4eb07a8913109a5a03a9c19526eade133e8a05e9e02b94ffa2d5771e62ff03f9
View on Chainz β†—

Height

#467,724

Difficulty

10.434563

Transactions

1

Size

202 B

Version

2

Bits

0a6f3f85

Nonce

229,060

Timestamp

3/31/2014, 12:04:35 AM

Confirmations

6,370,074

Merkle Root

0f0c669837ed95d984ced59df510103bfe31570938541babb8b52b572dde434a
Transactions (1)
Coinbase0f0c669837ed95…b52b572dde434a
1 in β†’ 1 out9.1700 XPM110 B
AeKNrjNj…1NEq95Ta
Prime Chain Origin

This is the prime chain origin stored in the block header. It is a composite number (not prime itself) β€” it equals the first prime in the chain multiplied by a primorial. The origin anchors the entire chain to this specific block.

3.541 Γ— 10⁹⁸(99-digit number)
35412393139907781117…59319859883705271040
Discovered Prime Numbers
Lower: 2^k Γ— origin βˆ’ 1 | Upper: 2^k Γ— origin + 1

These are the actual prime numbers discovered by this block, computed using the verified Primecoin formula. Each number has been independently confirmed to pass the Fermat primality test. Use the FactorDB links to verify any number independently.

Level 0 β€” Twin Prime Pair (origin Β± 1)
origin βˆ’ 1
3.541 Γ— 10⁹⁸(99-digit number)
35412393139907781117…59319859883705271039
Verify on FactorDB β†—Wolfram Alpha β†—
origin + 1
3.541 Γ— 10⁹⁸(99-digit number)
35412393139907781117…59319859883705271041
Verify on FactorDB β†—Wolfram Alpha β†—
Difference: origin + 1 βˆ’ origin βˆ’ 1 = 2 (twin primes βœ“)
Level 1 β€” Twin Prime Pair (2^1 Γ— origin Β± 1)
2^1 Γ— origin βˆ’ 1
7.082 Γ— 10⁹⁸(99-digit number)
70824786279815562234…18639719767410542079
Verify on FactorDB β†—Wolfram Alpha β†—
2^1 Γ— origin + 1
7.082 Γ— 10⁹⁸(99-digit number)
70824786279815562234…18639719767410542081
Verify on FactorDB β†—Wolfram Alpha β†—
Difference: 2^1 Γ— origin + 1 βˆ’ 2^1 Γ— origin βˆ’ 1 = 2 (twin primes βœ“)
Level 2 β€” Twin Prime Pair (2^2 Γ— origin Β± 1)
2^2 Γ— origin βˆ’ 1
1.416 Γ— 10⁹⁹(100-digit number)
14164957255963112446…37279439534821084159
Verify on FactorDB β†—Wolfram Alpha β†—
2^2 Γ— origin + 1
1.416 Γ— 10⁹⁹(100-digit number)
14164957255963112446…37279439534821084161
Verify on FactorDB β†—Wolfram Alpha β†—
Difference: 2^2 Γ— origin + 1 βˆ’ 2^2 Γ— origin βˆ’ 1 = 2 (twin primes βœ“)
Level 3 β€” Twin Prime Pair (2^3 Γ— origin Β± 1)
2^3 Γ— origin βˆ’ 1
2.832 Γ— 10⁹⁹(100-digit number)
28329914511926224893…74558879069642168319
Verify on FactorDB β†—Wolfram Alpha β†—
2^3 Γ— origin + 1
2.832 Γ— 10⁹⁹(100-digit number)
28329914511926224893…74558879069642168321
Verify on FactorDB β†—Wolfram Alpha β†—
Difference: 2^3 Γ— origin + 1 βˆ’ 2^3 Γ— origin βˆ’ 1 = 2 (twin primes βœ“)
Level 4 β€” Twin Prime Pair (2^4 Γ— origin Β± 1)
2^4 Γ— origin βˆ’ 1
5.665 Γ— 10⁹⁹(100-digit number)
56659829023852449787…49117758139284336639
Verify on FactorDB β†—Wolfram Alpha β†—
2^4 Γ— origin + 1
5.665 Γ— 10⁹⁹(100-digit number)
56659829023852449787…49117758139284336641
Verify on FactorDB β†—Wolfram Alpha β†—
Difference: 2^4 Γ— origin + 1 βˆ’ 2^4 Γ— origin βˆ’ 1 = 2 (twin primes βœ“)

What this block proved

The miner who found this block proved the existence of 10 consecutive prime numbers forming a Bi-Twin Chain. The prime chain origin β€” the large number shown above β€” anchors the chain and is divisible by a primorial (the product of small primes), cryptographically tying these prime numbers to this specific block.

View full Prime Chain Discovery page β†’
β˜…β˜…β˜†β˜†β˜†
Rarity
UncommonChain length 10
How Primecoin's Proof-of-Work Constructs These Primes

Primecoin stores a value called the prime chain origin in each block. The miner found a large integer such that when divided by a primorial (the product of small primes: 2 Γ— 3 Γ— 5 Γ— 7 Γ— …), the result is the first prime in the chain. The origin is deliberately divisible by this primorial β€” that divisibility is part of the proof.

Prime Chain Origin = First Prime Γ— Primorial (2Β·3Β·5Β·7Β·11·…)
Source: Primecoin prime.cpp β€” CheckPrimeProofOfWork()

This is why the origin has many small prime factors β€” those factors are the primorial divisor. The chain then extends from the first prime using the TWN formula:

TWN: twin pairs (p, p+2) where p = origin/primorial βˆ’ 1 and p+2 = origin/primorial + 1
Verify on a Primecoin Node

Anyone running a Primecoin node can independently verify this block using the following RPC commands. Run these from the primecoin-cli command line or via the debug console in the Primecoin wallet.

1. Get block hash by height
getblockhash 467724

Returns the block hash for a given block height. Use this to confirm the hash shown above matches the chain.

2. Get full block data
getblock 4eb07a8913109a5a03a9c19526eade133e8a05e9e02b94ffa2d5771e62ff03f9

Returns the full block header including difficulty, prime chain origin, prime chain type, transaction IDs, and all other fields shown on this page.

How to run these commands: To verify this data independently, open a terminal on your own Primecoin node and run primecoin-cli <command>. Alternatively, open the Primecoin-Qt wallet, go to Help β†’ Debug Window β†’ Console, and type the command directly. The node must be fully synced to this block height for the commands to return results.

Cross-reference on Chainz Explorer

Chainz is an independent Primecoin block explorer. Compare this block's data to verify accuracy.

View Block #467,724 on Chainz β†—
Circulating Supply:57,946,722 XPMΒ·at block #6,837,797 Β· updates every 60s
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