Block #2,158,824
2CC0a.f82fa9Discovered 6/13/2017, 9:05:49 AM · Difficulty 10.9043 · 4,634,017 confirmations
Height
#2,158,824
Difficulty
10.904349
Transactions
24
Size
8.82 KB
Version
2
Bits
0ae78363
Nonce
709,710,275
Timestamp
6/13/2017, 9:05:49 AM
Confirmations
4,634,017
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.f82fa9 formula: