Block #2,462,078

2CC0a.ffbcda

Discovered 1/7/2018, 4:45:56 PM · Difficulty 10.9565 · 4,333,983 confirmations

Block Header

Block Hash

a8d8598f7a34a804361a92c97fb8684d7037f7c13b0917756012f2ad4d1c6869

View on Chainz ↗

Height

#2,462,078

Difficulty

10.956473

Transactions

Size

870 B

Version

Bits

0af4db65

Nonce

372,658,578

Timestamp

1/7/2018, 4:45:56 PM

Confirmations

4,333,983

Mined by

⛏️ P2SHASqHDZ1wr99WK2mgUH5Ve7D1qXQM1E2517

Merkle Root

5ded645ff44f1626746a0a9043d91339f2b340696a07f5c2285dd704b9768765

Transactions (2)

Coinbased377410b60f7fa…f08f5562f83960

1 in → 1 out8.3300 XPM109 B

ASqHDZ1w…QM1E2517

e582e8a715dccb…77fa8d7510cf92

4 in → 2 out11.9944 XPM671 B

AZjuJGi3…MFbdYgjD AeW7B5NE…epUeBcDk

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.

8.395 × 10⁹³(94-digit number)

83955439684650776205…08852421283604445440

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 2CC0a.ffbcda formula:

Cross-reference on Chainz Explorer