XPM Prime Explorer symbol
XPMPrime Explorer
Home/Chain Registry/Block #2,284,219

Block #2,284,219

TWNLength 10β˜…β˜…β˜†β˜†β˜†

Bi-Twin Chain Β· Discovered 9/6/2017, 1:22:10 AM Β· Difficulty 10.9551 Β· 4,540,646 confirmations

TWN
Bi-Twin Chain

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

Block Header
Block Hash
54221fb74a3c9044bf97eeaf860296caa0625929c8185adfb7e4dda490a3fbef
View on Chainz β†—

Difficulty

10.955052

Transactions

2

Size

542 B

Version

2

Bits

0af47e45

Nonce

412,624,523

Timestamp

9/6/2017, 1:22:10 AM

Confirmations

4,540,646

Merkle Root

0a14656fc9f1042d2e73c05f9476de9e7aa05be20d5dedb86ec0129ade3e9987
Transactions (2)
Coinbase848daa551dd291…5ae9290cb02f70
1 in β†’ 1 out8.3300 XPM110 B
AXAr67Ms…xdWBhm6g
7a780c8959dba2…489c3c9fd42605
2 in β†’ 1 out2499.9900 XPM341 B
AcxhUhX6…N8N8w2tm
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.

2.096 Γ— 10⁹⁷(98-digit number)
20969866193565226011…47256239347305021440
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
2.096 Γ— 10⁹⁷(98-digit number)
20969866193565226011…47256239347305021439
Verify on FactorDB β†—Wolfram Alpha β†—
origin + 1
2.096 Γ— 10⁹⁷(98-digit number)
20969866193565226011…47256239347305021441
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
4.193 Γ— 10⁹⁷(98-digit number)
41939732387130452023…94512478694610042879
Verify on FactorDB β†—Wolfram Alpha β†—
2^1 Γ— origin + 1
4.193 Γ— 10⁹⁷(98-digit number)
41939732387130452023…94512478694610042881
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
8.387 Γ— 10⁹⁷(98-digit number)
83879464774260904047…89024957389220085759
Verify on FactorDB β†—Wolfram Alpha β†—
2^2 Γ— origin + 1
8.387 Γ— 10⁹⁷(98-digit number)
83879464774260904047…89024957389220085761
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
1.677 Γ— 10⁹⁸(99-digit number)
16775892954852180809…78049914778440171519
Verify on FactorDB β†—Wolfram Alpha β†—
2^3 Γ— origin + 1
1.677 Γ— 10⁹⁸(99-digit number)
16775892954852180809…78049914778440171521
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
3.355 Γ— 10⁹⁸(99-digit number)
33551785909704361619…56099829556880343039
Verify on FactorDB β†—Wolfram Alpha β†—
2^4 Γ— origin + 1
3.355 Γ— 10⁹⁸(99-digit number)
33551785909704361619…56099829556880343041
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 2284219

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 54221fb74a3c9044bf97eeaf860296caa0625929c8185adfb7e4dda490a3fbef

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 #2,284,219 on Chainz β†—
Circulating Supply:57,843,001 XPMΒ·at block #6,824,864 Β· updates every 60s
xpmprime.info is a work in progress. If you enjoy using this service you can support this project with a Primecoin donation.
Privacy PolicyΒ·
AQZeJoQ81VgeHQBpEYTgvNqV1gnz3L5SvK

Cookie Preferences

We use cookies to enhance your experience. Some are essential for the site to function, while others help us understand how you use the site.

Β·Privacy Policy