Block #3,492,783

1CC0a.f933d4

Discovered 12/29/2019, 9:10:27 AM · Difficulty 10.9539 · 3,313,129 confirmations

Block Header

Block Hash

ceab30dccfd432417e629b85153246941190e15e1126dfd1b102b33cc93b7298

View on Chainz ↗

Height

#3,492,783

Difficulty

10.953943

Transactions

Size

539 B

Version

Bits

0af43598

Nonce

561,482,013

Timestamp

12/29/2019, 9:10:27 AM

Confirmations

3,313,129

Mined by

⛏️ P2SHASiq2qtKTzQ7sbERFE8Jp8HjsgVMhmk7yL

Merkle Root

9f65d045ca716caa2a6f28334155aec5e43350b583db0130df426d5511764be9

Transactions (2)

Coinbase61927364df0aa6…ab24d117515c9b

1 in → 1 out8.3300 XPM110 B

ASiq2qtK…VMhmk7yL

12167b0699b247…dece016d54f10a

2 in → 2 out11.5500 XPM339 B

AV6bKmS6…nubKLA2Y 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.

6.017 × 10⁹³(94-digit number)

60178527016521403468…42728113336092492100

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.f933d4 formula:

Cross-reference on Chainz Explorer