XPM Prime Explorer symbol
XPMPrime Explorer

Block #2,616,216

1CC0b.9bdf4b

Discovered 4/16/2018, 8:02:36 AM · Difficulty 11.2257 · 4,179,027 confirmations

Block Header
Block Hash
7c6ecb02541c3a3fda4d3431699dd6139ffabbeaa29de8d436fa2aa5ad3ffc01
View on Chainz ↗

Height

#2,616,216

Difficulty

11.225700

Transactions

55

Size

104.50 KB

Version

2

Bits

0b39c77d

Nonce

1,239,379,648

Timestamp

4/16/2018, 8:02:36 AM

Confirmations

4,179,027

Mined by

⛏️ P2SHAbeXHnjVjSBQHatBXoKQzqappHMose9j2a

Merkle Root

71e4f8eee5e983652683d23c4d8c35b0433ed490739a3d529a6790e70662aad2
Transactions (55)
Coinbase4e7ead2e413797…4dec35a3965215
1 in → 1 out9.3700 XPM110 B
AbeXHnjV…Mose9j2a
1471402a802671…a7e01648c516d4
618 in → 2 out700.0100 XPM89.41 KB
ALPF8J52…Hjw4BMsGAVeJtT29…m23zKkqk
d55828f7059611…74e47f8ecab155
1 in → 2 out7.9400 XPM191 B
ARQyvGVi…ZUPBdUBGAaAz5yH1…jh5D1ecV
d6ae94abc8f813…2e943621ef2889
1 in → 2 out7.9400 XPM191 B
AVJ8Ki6c…ftY8bMh7ATsWgKFc…hwY8XqSc
bb4a190c3b6812…ed61a70e2428bb
1 in → 2 out7.9400 XPM191 B
AXeeKcMW…oLBHBmTLAbRXJrTX…9Ffmm9TK
3f36c8e377da03…88f9fc8c7fd221
1 in → 2 out7.9400 XPM191 B
AUo7p97H…sJ9AyoTaAHv9ZQzZ…BhzZXuZU
d5dede8889954a…046e3f901ed3d0
1 in → 2 out8.0200 XPM192 B
AWMqxZhY…hqDJeTanAcHHq3Z3…7LUP3kty
86b6489bee9429…010d21dd0b44ae
1 in → 2 out7.9400 XPM192 B
AJqw3ViH…vAW4GHgRAZRwmWrL…vJs9AmcZ
56860c498772a3…5713afc474ba31
1 in → 2 out7.9400 XPM192 B
AKtxrfsr…TVax6bCsAXh8UBXr…JUzAfddX
bea612b3b1a92d…f742991409ffea
1 in → 2 out7.9400 XPM192 B
AY4BBeF3…SHLnXEmbAUWbLovq…qXKQZNnR
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.

2.422 × 10⁹³(94-digit number)
24225505429770206684…07421118595045100160
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 1CC0b.9bdf4b formula:

Cross-reference on Chainz Explorer
Circulating Supply:57,605,999 XPM·at block #6,795,242 · updates every 60s
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