XPM Prime Explorer symbol
XPMPrime Explorer
Home/Chain Registry/Block #3,160,165

Block #3,160,165

TWNLength 12β˜…β˜…β˜…β˜…β˜†

Bi-Twin Chain Β· Discovered 4/29/2019, 6:33:55 AM Β· Difficulty 11.3100 Β· 3,681,060 confirmations

TWN
Bi-Twin Chain

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

Block Header
Block Hash
7b8c1275a2dce60292a2426400015ae22511cbcef0ede1ea98c57011dce4780d
View on Chainz β†—

Difficulty

11.310019

Transactions

1

Size

201 B

Version

2

Bits

0b4f5d64

Nonce

1,639,719,025

Timestamp

4/29/2019, 6:33:55 AM

Confirmations

3,681,060

Merkle Root

8a89973890d6bc807f416d5ce2332e8e69d75d075b27a46eb9c28600ffaadc07
Transactions (1)
Coinbase8a89973890d6bc…c28600ffaadc07
1 in β†’ 1 out7.8000 XPM110 B
AbXwmGxD…4XXYP765
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.

2.729 Γ— 10⁹⁢(97-digit number)
27299723643298616797…14343420537090248960
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
2.729 Γ— 10⁹⁢(97-digit number)
27299723643298616797…14343420537090248959
Verify on FactorDB β†—Wolfram Alpha β†—
origin + 1
2.729 Γ— 10⁹⁢(97-digit number)
27299723643298616797…14343420537090248961
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
5.459 Γ— 10⁹⁢(97-digit number)
54599447286597233594…28686841074180497919
Verify on FactorDB β†—Wolfram Alpha β†—
2^1 Γ— origin + 1
5.459 Γ— 10⁹⁢(97-digit number)
54599447286597233594…28686841074180497921
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
1.091 Γ— 10⁹⁷(98-digit number)
10919889457319446718…57373682148360995839
Verify on FactorDB β†—Wolfram Alpha β†—
2^2 Γ— origin + 1
1.091 Γ— 10⁹⁷(98-digit number)
10919889457319446718…57373682148360995841
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
2.183 Γ— 10⁹⁷(98-digit number)
21839778914638893437…14747364296721991679
Verify on FactorDB β†—Wolfram Alpha β†—
2^3 Γ— origin + 1
2.183 Γ— 10⁹⁷(98-digit number)
21839778914638893437…14747364296721991681
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
4.367 Γ— 10⁹⁷(98-digit number)
43679557829277786875…29494728593443983359
Verify on FactorDB β†—Wolfram Alpha β†—
2^4 Γ— origin + 1
4.367 Γ— 10⁹⁷(98-digit number)
43679557829277786875…29494728593443983361
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
8.735 Γ— 10⁹⁷(98-digit number)
87359115658555573751…58989457186887966719
Verify on FactorDB β†—Wolfram Alpha β†—
2^5 Γ— origin + 1
8.735 Γ— 10⁹⁷(98-digit number)
87359115658555573751…58989457186887966721
Verify on FactorDB β†—Wolfram Alpha β†—
Difference: 2^5 Γ— origin + 1 βˆ’ 2^5 Γ— origin βˆ’ 1 = 2 (twin primes βœ“)

What this block proved

The miner who found this block proved the existence of 12 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
ExceptionalChain length 12
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 3160165

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 7b8c1275a2dce60292a2426400015ae22511cbcef0ede1ea98c57011dce4780d

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 #3,160,165 on Chainz β†—
Circulating Supply:57,974,158 XPMΒ·at block #6,841,224 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