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Block #288,446

0000000000000000ef3af8fa7a8e7f86dcf171a7e0075dd926dd5cc638768cff

Likely solo-mined
Strong Solo Candidate mempool.space
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Why this block matters

This block shows very strong signals of solo mining — no shared-pool payout pattern was detected and the confidence score is high.

  • No shared-pool signature or coinbase tag detected
  • Payout address has never received a block reward before — consistent with solo mining
  • Mined against 0 EH/s of total network hashrate — statistically rare for solo mining
  • Found 26m 13s after the previous solo candidate (#288,443)

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This block is classified as a strong solo candidate. Solo mining is lottery-like — even small miners can participate, but finding a block is statistically rare.

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Block Data

Time1 Mar 2014, 14:01 UTCConfirmations677,950Transactions37Size79,970 bytesWeight319,880 WU

Reward

Subsidy + Fees25.00870 BTCFees only0.00870 BTCValue at time$17,028BTC price$681Mining poolNot identified

Detection

Likely solo-mined
Final score
80/100
Base score70History adj.+10Interval adj.0Pool signatureNone detected

no pool signature; unknown coinbase pattern; fresh payout address (DB); no reuse 24h; no reuse 7d; history_adj=+10 (first_time_winner)

Network at mining time

Network hashrate0 EH/s

Against 0 EH/s of total network hashrate, the odds of a solo miner winning are extremely low — making this block remarkable.

Detection Signals

No pool signature+40
New address+10
No reuse (7d)+5
No reuse (24h)+5
Address history+10
Final score80/100

Address History

Historical wins0Previous winInterval since lastFirst win everWins last 30d0
RecurrenceFirst win
IntervalNo prior win

This address has never received a block reward before — consistent with solo mining.

Total blocks
1
Solo candidates
1
Solo rate
100.0%
Coinbase Message (raw)
fLF