Block #3,526,413
TWN0b.3e504dDiscovered 1/22/2020, 9:23:42 PM · Difficulty 10.9370 · 3,315,233 confirmations
Height
#3,526,413
Difficulty
10.936962
Transactions
2
Size
390 B
Version
2
Bits
0aefdcb6
Nonce
1,060,523,713
Timestamp
1/22/2020, 9:23:42 PM
Confirmations
3,315,233
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.3e504d formula: