Equium

Equium is an SPL asset on Solana distributed through Equihash 96,5 proof of work. An on-chain program opens a round about every minute, and the first participant to submit a valid solution whose hash falls below the current target receives 25 tokens; solutions are bound to the wallet public key, so a copier must re-solve from scratch. The algorithm is memory-bound, using roughly 50 MB of state per solve.

Difficulty retargets every 60 blocks against a 3,600 second window, clamped to a factor of 0.5 to 2 per adjustment, and the reward halves every 378,000 blocks, about 8.6 months, against a cap of 21 million. Solving happens locally while the chain only verifies and pays out, so a round costs the same regardless of how many participants join. It is treated as a Bitcoin-style monetary experiment ported to Solana, distinct from ordinary Solana tokens because issuance depends entirely on compute. Browser, desktop and command-line miners are published as open source.