Executive Hashpower is what happens when miners decide to act, ignoring markets temporarily. Not following short-term benefit, but a potential future profit (monetary or reputational).
| Precedent | When | Where | Height | Duration | Reorg | Accidental | Hashwar | Double-spend | Split | |
|---|---|---|---|---|---|---|---|---|---|---|
| 1. | Bug + 51 blocks Reorg | 2010-08-15 (12.6y) | Bitcoin | 74637 | 8h 27m | 51 blocks | ✔ | |||
| 2. | Bug + 24 blocks Reorg | 2013-03-11 (10.1y) | Bitcoin | 225430 | 6h 20m | 24 blocks | ✔ | ✔ | ||
| 3. | BTC-BCH Split | 2017-08-01 (5.7y) | BTC-BCH | 478559 | 4h 56m | ✔ | ||||
| 4. | BCH-BSV Split + Hashwar | 2018-11-15 (4.4y) | BCH-BSV | 556767 | ~9 days | ✔ | ✔ | |||
| 5. | Segwit theft + Reorg | 2019-05-15 (3.9y) | BCH | 582698 | 23m | 2 blocks | ||||
| 6. | BCH-XEC Split | 2020-11-15 (2.4y) | BCH-XEC | 661648 | 20h | ✔ | ||||
| 7. | XEC Hashwar (empty blocks) | 2020-11-28 (2.3y) | XEC | 662397 | ~5 days | 198 blocks | ✔ |
Bug CVE-2010-5139 in Bitcoin-Qt version 0.3.10.