Block #3,321,277

2CC0b.d744f4

Discovered 8/21/2019, 10:13:15 PM · Difficulty 11.0209 · 3,472,493 confirmations

Block Header

Block Hash

6b9bea4033add9a6a85cdf874bf24910c8b0a5f77086ee31acbedbbd75a0c073

View on Chainz ↗

Height

#3,321,277

Difficulty

11.020881

Transactions

Size

540 B

Version

Bits

0b055873

Nonce

210,705,471

Timestamp

8/21/2019, 10:13:15 PM

Confirmations

3,472,493

Merkle Root

82772a435fe75fd239c2f03b9eb86215e28b11390cc49880b763d7656fb0dc00

Transactions (2)

Coinbase7fbf9005b63500…b477ac2175b1e9

1 in → 1 out8.2300 XPM110 B

ASiq2qtK…VMhmk7yL

442b777971b88f…f803cd002bb4f0

2 in → 1 out9.2400 XPM340 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.

6.207 × 10⁹⁵(96-digit number)

62078757623214512475…44324665232861150720

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.d744f4 formula:

Cross-reference on Chainz Explorer