Block #2,658,147

2CC0b.bce176

Discovered 5/12/2018, 3:01:02 PM · Difficulty 11.6562 · 4,134,020 confirmations

Block Header

Block Hash

a35f58b6b024921144fbeab499e44a90ba0db046876f9409f6103668214ce967

View on Chainz ↗

Height

#2,658,147

Difficulty

11.656241

Transactions

Size

7.04 KB

Version

Bits

0ba7ff65

Nonce

527,373,947

Timestamp

5/12/2018, 3:01:02 PM

Confirmations

4,134,020

Merkle Root

2c6fcecae0fe86c4e294372a5e103c16d28ef2625006e7404d039398fc795799

Transactions (4)

Coinbase895f67804968e6…fd2b10d82de03d

1 in → 1 out7.4400 XPM109 B

AKrBsDmV…zc6i8pDQ

06c74e09e58e67…404b95d550908b

43 in → 1 out99.9100 XPM6.26 KB

AZtVQ2Du…aPwErWoR

2ff1dc02279490…27819fd69b9ea5

2 in → 2 out272.1087 XPM376 B

AVS7QWp9…c7zowwvE AMacMFhM…iFNVuut4

4e22c424fe0bb5…ff550df974b15d

1 in → 2 out4.5119 XPM226 B

ALKb1AnK…21kEgaZA ALxskxzJ…mwRWwWjn

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.

1.151 × 10⁹⁷(98-digit number)

11512992693900390600…61337640977059020800

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.bce176 formula:

Cross-reference on Chainz Explorer