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Block #6,784,913

TWNLength 11★★★☆☆

Bi-Twin Chain · Discovered 4/5/2026, 10:39:09 PM · Difficulty 10.9809 · 8,000 confirmations

TWN

Bi-Twin Chain

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

Block Header

Block Hash

2bde51192261fa460df5094a02bdc62d4a6049e0efd9fd66fdbb4f2255000818

View on Chainz ↗

Height

#6,784,913

Difficulty

10.980853

Transactions

Size

191 B

Version

536870912

Bits

0afb192c

Nonce

938,621,741

Timestamp

4/5/2026, 10:39:09 PM

Confirmations

8,000

Merkle Root

8e786337633d2213d504ec647c1dab13620da5e854c9493d614ed438d56c590c

Transactions (1)

Coinbase8e786337633d22…4ed438d56c590c

1 in → 1 out8.1790 XPM101 B

AMrLYUQN…jwjifxiz

Prime Chain Origin

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

2.854 × 10⁹⁴(95-digit number)

28541589003536898784…97758784821063797280

Discovered Prime Numbers

Lower: 2^k × origin − 1 | Upper: 2^k × 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 — Twin Prime Pair (origin ± 1)

origin − 1

2.854 × 10⁹⁴(95-digit number)

28541589003536898784…97758784821063797279

Verify on FactorDB ↗Wolfram Alpha ↗

origin + 1

2.854 × 10⁹⁴(95-digit number)

28541589003536898784…97758784821063797281

Verify on FactorDB ↗Wolfram Alpha ↗

Difference: origin + 1 − origin − 1 = 2 (twin primes ✓)

Level 1 — Twin Prime Pair (2^1 × origin ± 1)

2^1 × origin − 1

5.708 × 10⁹⁴(95-digit number)

57083178007073797568…95517569642127594559

Verify on FactorDB ↗Wolfram Alpha ↗

2^1 × origin + 1

5.708 × 10⁹⁴(95-digit number)

57083178007073797568…95517569642127594561

Verify on FactorDB ↗Wolfram Alpha ↗

Difference: 2^1 × origin + 1 − 2^1 × origin − 1 = 2 (twin primes ✓)

Level 2 — Twin Prime Pair (2^2 × origin ± 1)

2^2 × origin − 1

1.141 × 10⁹⁵(96-digit number)

11416635601414759513…91035139284255189119

Verify on FactorDB ↗Wolfram Alpha ↗

2^2 × origin + 1

1.141 × 10⁹⁵(96-digit number)

11416635601414759513…91035139284255189121

Verify on FactorDB ↗Wolfram Alpha ↗

Difference: 2^2 × origin + 1 − 2^2 × origin − 1 = 2 (twin primes ✓)

Level 3 — Twin Prime Pair (2^3 × origin ± 1)

2^3 × origin − 1

2.283 × 10⁹⁵(96-digit number)

22833271202829519027…82070278568510378239

Verify on FactorDB ↗Wolfram Alpha ↗

2^3 × origin + 1

2.283 × 10⁹⁵(96-digit number)

22833271202829519027…82070278568510378241

Verify on FactorDB ↗Wolfram Alpha ↗

Difference: 2^3 × origin + 1 − 2^3 × origin − 1 = 2 (twin primes ✓)

Level 4 — Twin Prime Pair (2^4 × origin ± 1)

2^4 × origin − 1

4.566 × 10⁹⁵(96-digit number)

45666542405659038054…64140557137020756479

Verify on FactorDB ↗Wolfram Alpha ↗

2^4 × origin + 1

4.566 × 10⁹⁵(96-digit number)

45666542405659038054…64140557137020756481

Verify on FactorDB ↗Wolfram Alpha ↗

Difference: 2^4 × origin + 1 − 2^4 × origin − 1 = 2 (twin primes ✓)

Level 5 — Twin Prime Pair (2^5 × origin ± 1)

2^5 × origin − 1

9.133 × 10⁹⁵(96-digit number)

91333084811318076109…28281114274041512959

Verify on FactorDB ↗Wolfram Alpha ↗

What this block proved

The miner who found this block proved the existence of 11 consecutive prime numbers forming a Bi-Twin Chain. The prime chain origin — the large number shown above — 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 →

★★★☆☆

Rarity

RareChain length 11

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 × 3 × 5 × 7 × …), the result is the first prime in the chain. The origin is deliberately divisible by this primorial — that divisibility is part of the proof.

Prime Chain Origin = First Prime × Primorial (2·3·5·7·11·…)

Source: Primecoin prime.cpp — CheckPrimeProofOfWork()

This is why the origin has many small prime factors — 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 − 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 6784913

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 2bde51192261fa460df5094a02bdc62d4a6049e0efd9fd66fdbb4f2255000818

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 → Debug Window → 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 #6,784,913 on Chainz ↗