Block #3,494,347
1CC0b.f5c06cDiscovered 12/30/2019, 7:30:36 PM · Difficulty 10.9492 · 3,306,938 confirmations
Height
#3,494,347
Difficulty
10.949230
Transactions
2
Size
689 B
Version
2
Bits
0af300c4
Nonce
177,286,191
Timestamp
12/30/2019, 7:30:36 PM
Confirmations
3,306,938
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 1CC0b.f5c06c formula: