Block #4,113,749
TWN0a.ff6a12Discovered 3/9/2021, 5:46:08 PM · Difficulty 10.8298 · 2,682,266 confirmations
Height
#4,113,749
Difficulty
10.829829
Transactions
7
Size
10.86 KB
Version
2
Bits
0ad46fab
Nonce
1,936,643,448
Timestamp
3/9/2021, 5:46:08 PM
Confirmations
2,682,266
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 TWN0a.ff6a12 formula: