Block #3,473,570

1CC0a.fae294

Discovered 12/13/2019, 5:36:06 AM · Difficulty 10.9788 · 3,328,198 confirmations

Block Header

Block Hash

ac7b1077e90584bc1316b45fd63d4dd0a058b3bf0082adc4c9352cec06073c61

View on Chainz ↗

Height

#3,473,570

Difficulty

10.978833

Transactions

Size

506 B

Version

Bits

0afa94cf

Nonce

881,152,275

Timestamp

12/13/2019, 5:36:06 AM

Confirmations

3,328,198

Mined by

⛏️ P2SHASiq2qtKTzQ7sbERFE8Jp8HjsgVMhmk7yL

Merkle Root

d7e4442a6f48de720ff20c36fe2f8b6f986861255c9508936a5ff50798112948

Transactions (2)

Coinbase5a35e191e1d4fb…fcca9e950aa3fe

1 in → 1 out8.2900 XPM110 B

ASiq2qtK…VMhmk7yL

40849ede8f3c26…6ba085f2a72c27

2 in → 2 out16.5500 XPM306 B

Ae6H1FDy…cfmnKJtM ALh3G4wq…cFPms2mF

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.

1.906 × 10⁹⁴(95-digit number)

19064704413236768219…03149301414885434330

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 1CC0a.fae294 formula:

Cross-reference on Chainz Explorer