XPM Prime Explorer symbol
XPMPrime Explorer

Block #2,284,622

1CC0a.fd1f88

Discovered 9/6/2017, 7:57:35 AM · Difficulty 10.9551 · 4,511,281 confirmations

Block Header
Block Hash
747bcd251894ff917163d6bdf4ab61f5d19e9f667976d65e17ec0deadf9d30a9
View on Chainz ↗

Height

#2,284,622

Difficulty

10.955138

Transactions

27

Size

6.80 KB

Version

2

Bits

0af483f0

Nonce

1,189,251,621

Timestamp

9/6/2017, 7:57:35 AM

Confirmations

4,511,281

Mined by

⛏️ P2SHAawkXo3Zet6AdSXp8SkkgbVDuVdQKATmXm

Merkle Root

3902b00b23396d1b4106f23dadf342b72033104e590e03c9681aafb95d0e6198
Transactions (27)
Coinbasec7d62bb8fe501a…5b30a990ee3439
1 in → 1 out8.5900 XPM110 B
AawkXo3Z…dQKATmXm
22ccb4c855eca2…34c0e269f7afeb
3 in → 2 out24.9700 XPM420 B
APVKWthF…PMMxwRozAZMqxUCd…JemSyB2X
a650a3d4f8a03d…9f7fdbcb11da35
2 in → 2 out16.6400 XPM307 B
ASJMpncq…WCCfHvnPAbrC4fSi…yBqfM9bu
68b5da8ecf03f5…ad8f6359bcac3e
2 in → 2 out16.6400 XPM305 B
AaRiDxAE…SBKkw3cYAS6BfMDx…yWVBQAXY
98d6136b39c9ca…0a7c4d32c8f31b
1 in → 2 out8.3100 XPM193 B
ATyb9V7E…MUXf3TaMAN83v1TU…kcXerDsJ
ff194ccd43f3a6…9327a91833f74b
1 in → 2 out8.3100 XPM191 B
AeRp2Dez…dZznGXKXAQipFUJn…CdwxNcQS
f04657778b1a46…ef80d0c48768f0
1 in → 2 out8.3100 XPM193 B
AVBPpGAS…arLZczWoANEMMbxx…yxibpPYi
a1ee64f4671677…16aafeb8213783
1 in → 2 out8.3100 XPM192 B
AQzxKsKY…R92tusZkAa5LD7N9…GYYYyXMb
039f7f86e4a52c…6fac79766c4377
1 in → 2 out8.3100 XPM193 B
AQ6GYY6E…yUPscrRaAaw5P66S…sQphoSNb
979feb7ac40631…c864d1d032e4ae
1 in → 2 out8.3100 XPM192 B
AP5zUha3…MRKHGdHPAbDeH46E…SEP6i3eb
Prime Chain Origin

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.

1.931 × 10⁹⁴(95-digit number)
19316255836793463695…00337186712987391200
How Primecoin's Proof-of-Work Constructs These Primes

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.

Prime Chain Origin = First Prime × Primorial (2·3·5·7·11·…)
Source: Primecoin prime.cpp — CheckPrimeProofOfWork()

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 1CC0a.fd1f88 formula:

Cross-reference on Chainz Explorer
Circulating Supply:57,611,308 XPM·at block #6,795,902 · updates every 60s
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