Block #2,245,032
2CC0a.f7a650Discovered 8/10/2017, 7:42:26 AM · Difficulty 10.9472 · 4,549,259 confirmations
Height
#2,245,032
Difficulty
10.947207
Transactions
19
Size
4.02 KB
Version
2
Bits
0af27c22
Nonce
276,090,146
Timestamp
8/10/2017, 7:42:26 AM
Confirmations
4,549,259
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.f7a650 formula: