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Block #574,670

TWNLength 10β˜…β˜…β˜†β˜†β˜†

Bi-Twin Chain Β· Discovered 6/3/2014, 11:34:41 AM Β· Difficulty 10.9678 Β· 6,237,747 confirmations

TWN
Bi-Twin Chain

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

Block Header
Block Hash
8354269a5bd1ae95eb63de2d98e622b296399892fd24e2a69a731e91dee7666c
View on Chainz β†—

Height

#574,670

Difficulty

10.967798

Transactions

1

Size

244 B

Version

2

Bits

0af7c1a3

Nonce

482,790,439

Timestamp

6/3/2014, 11:34:41 AM

Confirmations

6,237,747

Merkle Root

e1cef42eb5478c6b777352ee5abafc08fe6b07f526803bd403be6f3913093557
Transactions (1)
Coinbasee1cef42eb5478c…be6f3913093557
1 in β†’ 2 out8.3000 XPM152 B
AXn1KW6P…c7VDu2zvALPu3s2c…EJXLjVFh
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.

1.311 Γ— 10⁹⁹(100-digit number)
13113469100555355083…86001534744747822080
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
1.311 Γ— 10⁹⁹(100-digit number)
13113469100555355083…86001534744747822079
Verify on FactorDB β†—Wolfram Alpha β†—
origin + 1
1.311 Γ— 10⁹⁹(100-digit number)
13113469100555355083…86001534744747822081
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
2.622 Γ— 10⁹⁹(100-digit number)
26226938201110710166…72003069489495644159
Verify on FactorDB β†—Wolfram Alpha β†—
2^1 Γ— origin + 1
2.622 Γ— 10⁹⁹(100-digit number)
26226938201110710166…72003069489495644161
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
5.245 Γ— 10⁹⁹(100-digit number)
52453876402221420333…44006138978991288319
Verify on FactorDB β†—Wolfram Alpha β†—
2^2 Γ— origin + 1
5.245 Γ— 10⁹⁹(100-digit number)
52453876402221420333…44006138978991288321
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
1.049 Γ— 10¹⁰⁰(101-digit number)
10490775280444284066…88012277957982576639
Verify on FactorDB β†—Wolfram Alpha β†—
2^3 Γ— origin + 1
1.049 Γ— 10¹⁰⁰(101-digit number)
10490775280444284066…88012277957982576641
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
2.098 Γ— 10¹⁰⁰(101-digit number)
20981550560888568133…76024555915965153279
Verify on FactorDB β†—Wolfram Alpha β†—
2^4 Γ— origin + 1
2.098 Γ— 10¹⁰⁰(101-digit number)
20981550560888568133…76024555915965153281
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 574670

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 8354269a5bd1ae95eb63de2d98e622b296399892fd24e2a69a731e91dee7666c

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 #574,670 on Chainz β†—
Circulating Supply:57,743,357 XPMΒ·at block #6,812,416 Β· updates every 60s
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AQZeJoQ81VgeHQBpEYTgvNqV1gnz3L5SvK

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