Kilosat black
The last sat of every 1,000th bitcoin: a sat s where s + 1 is divisible by 100,000,000,000 but not by 1,000,000,000,000, nearly always a block's last sat.
How a sat qualifies
An omega is the last sat of a whole bitcoin: a sat s where s + 1 is divisible by 100,000,000. Sat s is a kilosat omega when s + 1 is divisible by 100,000,000,000 (1,000 bitcoin) but not by 1,000,000,000,000.
Every milestone sat has exactly one milestone tier, the highest, worked out on s + 1: divisible by 100,000,000,000,000 is megasat, else by 10,000,000,000,000 centasat, else by 1,000,000,000,000 decasat, else by 100,000,000,000 kilosat.
The first is sat 99,999,999,999, the last sat of block 19 (also a 1D palindrome).
Why "black"
The fork calls the type kilosat_omega. The site labels it Kilosat black and lists it as one of Black's rarest sub-categories, because these sats almost always close a block. Of the 18,900 there will be:
- 18,820 are plain black;
- 61 are black rare;
- 1 is black epic: sat 1,837,499,999,999,999, the last sat of block 629,999;
- 18 fall mid-block, all in blocks from 2,130,880 on (for example sat 2,098,099,999,999,999).
The category matches by type, so it holds all of them. A black rare kilosat omega is in Kilosat black and Black rare, never in Black.
Its pair
The sat right after each one, s + 1, is a Kilosat uncommon of the same milestone tier. The site's pair rule counts a Kilosat black sold with a Kilosat uncommon as part of the uncommon's sale.
How many
Will ever exist: 18,900. Mined so far: 18,091. Extracted, held alone in small outputs: 1,892.
Supply and market
| Category | Will exist | Mined | Extracted | Last sale | Floor |
|---|---|---|---|---|---|
| Kilosat black | 18,900 | 18,091 | 1,892 | 79,000 sats | 94,454 sats |
As of block 972,427. Prices are per sat.