In accordance with its protocol, Grin no longer supports the C31 mining algorithm. Corresponding shares of block outputs of C31 became 0 when the block height reached 826,560 at 03:59:08 on August 14, 2020 UTC. Grin supports multiple mining algorithms, and each algorithm’s share of block output continues to change.

Miners should switch to Grin’s C29 or C32 mining algorithms or to other coins that are more profitable to mine to avoid potential losses.