Block #2,654,556
TWN0b.f76a1eDiscovered 5/9/2018, 10:12:12 AM · Difficulty 11.7188 · 4,141,283 confirmations
Height
#2,654,556
Difficulty
11.718841
Transactions
41
Size
14.34 KB
Version
2
Bits
0bb805f4
Nonce
1,273,010,215
Timestamp
5/9/2018, 10:12:12 AM
Confirmations
4,141,283
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.f76a1e formula: