Block #3,225,397

1CC0b.eb66d5

Discovered 6/14/2019, 8:40:23 PM · Difficulty 11.0069 · 3,567,403 confirmations

Block Header

Block Hash

4d21fc83e18d26ece075235848b7cf759d2d3450e6303e706a67525afb0768a5

View on Chainz ↗

Height

#3,225,397

Difficulty

11.006940

Transactions

Size

1.43 KB

Version

Bits

0b01c6d2

Nonce

2,121,263,044

Timestamp

6/14/2019, 8:40:23 PM

Confirmations

3,567,403

Merkle Root

3d48649209a8ae995dabeddecd354514c497b5131c812bc5b1173558cd489085

Transactions (2)

Coinbasecb4ef956a99965…561ce9cac7e18e

1 in → 1 out8.2600 XPM110 B

ARbm48qR…9xQc8DBX

1381c2f05427d6…5ed3ee8ef96d4d

8 in → 2 out14.4371 XPM1.23 KB

AYKZRBfK…Qi1vAB2M AdByuHzS…duR62m5o

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.

5.691 × 10⁹⁶(97-digit number)

56917158967472139944…97055009981894144000

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 1CC0b.eb66d5 formula:

Cross-reference on Chainz Explorer