Block #3,381,637
2CC0b.40b3c2Discovered 10/5/2019, 10:36:19 PM · Difficulty 10.9929 · 3,414,631 confirmations
Height
#3,381,637
Difficulty
10.992916
Transactions
3
Size
618 B
Version
2
Bits
0afe2fb7
Nonce
368,801,549
Timestamp
10/5/2019, 10:36:19 PM
Confirmations
3,414,631
Mined by
Merkle Root
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.
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.
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 2CC0b.40b3c2 formula: