Block #1,241,052
2CC0a.e76bb7Discovered 9/17/2015, 6:01:58 PM · Difficulty 10.7560 · 5,548,866 confirmations
Height
#1,241,052
Difficulty
10.755976
Transactions
3
Size
1.07 KB
Version
2
Bits
0ac187a6
Nonce
346,483,998
Timestamp
9/17/2015, 6:01:58 PM
Confirmations
5,548,866
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.e76bb7 formula: