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Home/Chain Registry/Block #1,828,597

Block #1,828,597

TWNLength 10β˜…β˜…β˜†β˜†β˜†

Bi-Twin Chain Β· Discovered 10/30/2016, 5:00:10 AM Β· Difficulty 10.7474 Β· 5,008,581 confirmations

TWN
Bi-Twin Chain

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

Block Header
Block Hash
7503d7deec89fe0c5ab7ebace3842c84f5cbbcaa56c4587246ede85c67940342
View on Chainz β†—

Difficulty

10.747352

Transactions

1

Size

199 B

Version

2

Bits

0abf5272

Nonce

651,460,679

Timestamp

10/30/2016, 5:00:10 AM

Confirmations

5,008,581

Merkle Root

6e7a18826012530355bbe32d811bc94df1a4d43f78f38bd285b6e58da192936e
Transactions (1)
Coinbase6e7a1882601253…b6e58da192936e
1 in β†’ 1 out8.6400 XPM109 B
AHLeEn1c…EqdPsPoN
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.

5.567 Γ— 10⁹⁴(95-digit number)
55670160769177567703…48475017204612355360
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
5.567 Γ— 10⁹⁴(95-digit number)
55670160769177567703…48475017204612355359
Verify on FactorDB β†—Wolfram Alpha β†—
origin + 1
5.567 Γ— 10⁹⁴(95-digit number)
55670160769177567703…48475017204612355361
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
1.113 Γ— 10⁹⁡(96-digit number)
11134032153835513540…96950034409224710719
Verify on FactorDB β†—Wolfram Alpha β†—
2^1 Γ— origin + 1
1.113 Γ— 10⁹⁡(96-digit number)
11134032153835513540…96950034409224710721
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
2.226 Γ— 10⁹⁡(96-digit number)
22268064307671027081…93900068818449421439
Verify on FactorDB β†—Wolfram Alpha β†—
2^2 Γ— origin + 1
2.226 Γ— 10⁹⁡(96-digit number)
22268064307671027081…93900068818449421441
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
4.453 Γ— 10⁹⁡(96-digit number)
44536128615342054162…87800137636898842879
Verify on FactorDB β†—Wolfram Alpha β†—
2^3 Γ— origin + 1
4.453 Γ— 10⁹⁡(96-digit number)
44536128615342054162…87800137636898842881
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
8.907 Γ— 10⁹⁡(96-digit number)
89072257230684108325…75600275273797685759
Verify on FactorDB β†—Wolfram Alpha β†—
2^4 Γ— origin + 1
8.907 Γ— 10⁹⁡(96-digit number)
89072257230684108325…75600275273797685761
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 1828597

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 7503d7deec89fe0c5ab7ebace3842c84f5cbbcaa56c4587246ede85c67940342

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 #1,828,597 on Chainz β†—
Circulating Supply:57,941,739 XPMΒ·at block #6,837,177 Β· updates every 60s
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