Firsthand Bitcoin · Data · Bitcoin miners
Data / Difficulty adjustments / 2015
The size of every bitcoin difficulty retarget, as a percentage.
Difficulty adjustment opened 2015 at +8.20% (January 12, 2015) and closed at +11.16% (December 31, 2015), up 36.2%. The high was +18.14% on December 18, 2015 and the low -6.14% on January 27, 2015.
| Month | Month end |
|---|---|
| January 2015 | -6.14% |
| February 2015 | +5.01% |
| March 2015 | -1.50% |
| April 2015 | -3.71% |
| May 2015 | -2.50% |
| June 2015 | -0.58% |
| July 2015 | +2.35% |
| August 2015 | +2.95% |
| September 2015 | +4.17% |
| October 2015 | +2.25% |
| November 2015 | +10.44% |
| December 2015 | +11.16% |
Each bar is one retarget. Most are small and upward, because hashrate keeps growing. The large negative ones mark the moments miners switched off in numbers: China’s mining ban in mid-2021 produced the biggest cut in bitcoin’s history, −28%.
Other years: 2026 · 2025 · 2024 · 2023 · 2022 · 2021 · 2020 · 2019 · 2018 · 2017 · 2016 · 2014 · 2013
Also in 2015: Bitcoin price · Distance from the all-time high · Network hashrate · Mining difficulty · Fees paid to miners · Transactions per day · Hashprice · Miner revenue · Bitmain releases and the bitcoin price · Break-even electricity price · What a bitcoin costs us to mine, against the market · Hash ribbons