XPM Prime Explorer symbol
XPMPrime Explorer
Home/Chain Registry/Block #2,719,783

Block #2,719,783

TWNLength 11β˜…β˜…β˜…β˜†β˜†

Bi-Twin Chain Β· Discovered 6/24/2018, 8:45:05 PM Β· Difficulty 11.6128 Β· 4,122,161 confirmations

TWN
Bi-Twin Chain

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

Block Header
Block Hash
c50bd99c6a3ab839cc4f118ee93ca088d669f27023852d997a33f1de0c123e6e
View on Chainz β†—

Difficulty

11.612750

Transactions

1

Size

199 B

Version

2

Bits

0b9cdd32

Nonce

125,289,404

Timestamp

6/24/2018, 8:45:05 PM

Confirmations

4,122,161

Merkle Root

a30d8839d6ae618c08df981d638acdba13c4c187dca6bc6282a6909f7f95ddd9
Transactions (1)
Coinbasea30d8839d6ae61…a6909f7f95ddd9
1 in β†’ 1 out7.4000 XPM110 B
AXMKZRr1…hk4DWdrK
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.

1.547 Γ— 10⁹²(93-digit number)
15475887158578058316…09207901163421394400
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
1.547 Γ— 10⁹²(93-digit number)
15475887158578058316…09207901163421394399
Verify on FactorDB β†—Wolfram Alpha β†—
origin + 1
1.547 Γ— 10⁹²(93-digit number)
15475887158578058316…09207901163421394401
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
3.095 Γ— 10⁹²(93-digit number)
30951774317156116633…18415802326842788799
Verify on FactorDB β†—Wolfram Alpha β†—
2^1 Γ— origin + 1
3.095 Γ— 10⁹²(93-digit number)
30951774317156116633…18415802326842788801
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
6.190 Γ— 10⁹²(93-digit number)
61903548634312233267…36831604653685577599
Verify on FactorDB β†—Wolfram Alpha β†—
2^2 Γ— origin + 1
6.190 Γ— 10⁹²(93-digit number)
61903548634312233267…36831604653685577601
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
1.238 Γ— 10⁹³(94-digit number)
12380709726862446653…73663209307371155199
Verify on FactorDB β†—Wolfram Alpha β†—
2^3 Γ— origin + 1
1.238 Γ— 10⁹³(94-digit number)
12380709726862446653…73663209307371155201
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
2.476 Γ— 10⁹³(94-digit number)
24761419453724893307…47326418614742310399
Verify on FactorDB β†—Wolfram Alpha β†—
2^4 Γ— origin + 1
2.476 Γ— 10⁹³(94-digit number)
24761419453724893307…47326418614742310401
Verify on FactorDB β†—Wolfram Alpha β†—
Difference: 2^4 Γ— origin + 1 βˆ’ 2^4 Γ— origin βˆ’ 1 = 2 (twin primes βœ“)
Level 5 β€” Twin Prime Pair (2^5 Γ— origin Β± 1)
2^5 Γ— origin βˆ’ 1
4.952 Γ— 10⁹³(94-digit number)
49522838907449786614…94652837229484620799
Verify on FactorDB β†—Wolfram Alpha β†—

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 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
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 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 2719783

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 c50bd99c6a3ab839cc4f118ee93ca088d669f27023852d997a33f1de0c123e6e

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 #2,719,783 on Chainz β†—
Circulating Supply:57,979,933 XPMΒ·at block #6,841,943 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