Block #2,188,590
TWN0b.586705Discovered 7/1/2017, 10:05:09 PM · Difficulty 10.9486 · 4,607,044 confirmations
Height
#2,188,590
Difficulty
10.948556
Transactions
36
Size
11.28 KB
Version
2
Bits
0af2d48e
Nonce
1,176,896,130
Timestamp
7/1/2017, 10:05:09 PM
Confirmations
4,607,044
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 TWN0b.586705 formula: