Block #3,493,330
TWN0b.91fdd2Discovered 12/29/2019, 9:57:49 PM · Difficulty 10.9519 · 3,307,307 confirmations
Height
#3,493,330
Difficulty
10.951907
Transactions
6
Size
1.89 KB
Version
2
Bits
0af3b031
Nonce
270,557,158
Timestamp
12/29/2019, 9:57:49 PM
Confirmations
3,307,307
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.91fdd2 formula: