Mining week: a solo miner wins a block, Binance closes its pool, MARA sells bitcoin
A solo miner with about half a petahash found a whole Bitcoin block, Binance is closing its mining pool, MARA sold 13,597 BTC, and Bitcoin Core disclosed a mining bug it fixed a year ago. Network hashrate fell about 9% week on week.
Updated
A solo miner with about 564 TH/s found a whole block
A miner on CKPool Solo found block 974,893 with a worker rated at 564 TH/s, roughly what two or three modern machines produce. A block pays 3.125 BTC plus fees, about $240,000 at this week's bitcoin price. The pool's developer put the chance for a miner of that size at about 1 in 35 per year. Soloblocks.io counts 36 solo-mined blocks from 11 February to 7 November 2026. Solo mining is a lottery: most machines never find a block.
Binance said it would disconnect its pool's miners at 07:00 UTC on Tuesday 10 November. The pool launched in April 2020 and once handled more than 2% of the network's computing power. In its last full week it found one block out of roughly 925. Its hashrate fell from about 26 EH/s in December 2025 to about 9.2 EH/s in October, a drop of roughly 65%. Foundry USA, AntPool and F2Pool hold a large share of the blocks.
MARA sold 13,597 BTC and repaid its bitcoin-backed loans
MARA, a listed Bitcoin miner, sold 13,597 BTC for about $1.1 billion and used $750 million of it to repay its bitcoin-collateralized loans, The Block reported on 9 November from its third-quarter results. Riot Platforms reported a similar move in its results on 4 November: its bitcoin holdings fell from 11,380 BTC to 2,418 BTC during the quarter, and it reported about $38 billion of contracted data-center lease revenue.
Bitcoin Core discloses a mining bug it fixed a year ago
Bitcoin Core developers disclosed three security flaws on 10 November. The most serious one could leave a mining node unable to build valid block templates after a chain reorganization, until the node was restarted. It affected versions 28.0 to 28.2 and 29.0 to 29.1. The fixes shipped in Bitcoin Core 30.0 on 10 October 2025 and in 29.2 four days later. Miners on older versions should update.
On 11 November 2026, 41 hosted miners of 5 models from 4 providers were for sale on Open Mine, each already installed at its provider. Hosting costs from $0.045 to $0.072 per kWh.
Network hashrate averaged about 970 EH/s from 3 to 9 November, against 1,069 EH/s the week before (mempool.space daily estimates). Difficulty resets every 2,016 blocks; after hashrate has fallen, the reset lowers difficulty, and each machine still running finds a larger share of the blocks.
Get the issue every Friday. Once a week the Open Mine Telegram channel posts the miners for sale, hosting rates per kWh and how much hashrate each provider delivered.