Block #3,472,842

TWN0b.92dece

Discovered 12/12/2019, 4:49:09 PM · Difficulty 10.9790 · 3,327,795 confirmations

Block Header

Block Hash

654d8fd2344a0d2b28d1384ccf803a7b7f975a2635ecb810e37645c84ff7a735

View on Chainz ↗

Height

#3,472,842

Difficulty

10.978974

Transactions

Size

539 B

Version

Bits

0afa9e06

Nonce

1,180,297,638

Timestamp

12/12/2019, 4:49:09 PM

Confirmations

3,327,795

Mined by

⛏️ P2SHASiq2qtKTzQ7sbERFE8Jp8HjsgVMhmk7yL

Merkle Root

898ed7ef9a0ed31489a95806256f1948d2c962b05c30bc038dd06bdbce0ae583

Transactions (2)

Coinbase95135d92c08934…e8d1b7062ee6f7

1 in → 1 out8.2900 XPM110 B

ASiq2qtK…VMhmk7yL

370095876eb9d4…8f432055c17143

2 in → 2 out14.8200 XPM339 B

ALh3G4wq…cFPms2mF AUZ7XrKd…Dtbhgksw

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.

3.388 × 10⁹⁴(95-digit number)

33881275016872442569…19598955098789747200

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 TWN0b.92dece formula:

Cross-reference on Chainz Explorer