Block #4,728,445
2CC0a.fb7cdaDiscovered 5/10/2022, 9:48:57 AM · Difficulty 10.8590 · 2,079,373 confirmations
Height
#4,728,445
Difficulty
10.859016
Transactions
1
Size
237 B
Version
2
Bits
0adbe87c
Nonce
104,513
Timestamp
5/10/2022, 9:48:57 AM
Confirmations
2,079,373
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 2CC0a.fb7cda formula: