Block #2,160,669
2CC0a.ff16a3Discovered 6/14/2017, 6:23:24 PM · Difficulty 10.9014 · 4,632,314 confirmations
Height
#2,160,669
Difficulty
10.901434
Transactions
7
Size
1.52 KB
Version
2
Bits
0ae6c462
Nonce
338,479,162
Timestamp
6/14/2017, 6:23:24 PM
Confirmations
4,632,314
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.ff16a3 formula: