Block #3,244,949

2CC0b.69224d

Discovered 6/28/2019, 4:51:33 PM · Difficulty 11.0135 · 3,549,388 confirmations

Block Header

Block Hash

4c01738eea86124d280003a9bf5bc9afc690e053bc9995047e9f459d009581b2

View on Chainz ↗

Height

#3,244,949

Difficulty

11.013532

Transactions

Size

357 B

Version

Bits

0b0376d7

Nonce

112,861,886

Timestamp

6/28/2019, 4:51:33 PM

Confirmations

3,549,388

Merkle Root

91bd9c6a03f0e1472a702d4e0b6f83db9eac6ff18c7dcd3072dc7f213b1e9c0b

Transactions (2)

Coinbase7db9eccc06d4ef…7095683103ec1f

1 in → 1 out8.2400 XPM110 B

ARbm48qR…9xQc8DBX

9e3dffc6401556…9e09c2065b13a5

1 in → 1 out8.5733 XPM157 B

Aetai7JD…t6Dkm7C8

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.

4.170 × 10⁹⁵(96-digit number)

41702938624111211112…95820588831273665920

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 2CC0b.69224d formula:

Cross-reference on Chainz Explorer