Ultra rarity is this token's modus operandi. 1 Un per block, halving every 102,000 blocks. Only 196,875 Proof of Work UNOs will be minted before 0.0001 minimum block subsidies take effect at block 612,000. Zero coins premined. UNO's are an SHA-256 POW coin with a block target of three minutes and a hard cap to the coin supply of 250,000.