Megasat black
The last sat of every millionth bitcoin: a sat s where s + 1 is divisible by 100,000,000,000,000. Twenty will ever exist, each a block's last sat.
How a sat qualifies
Sat s is a megasat omega when s + 1 is divisible by 100,000,000,000,000: the last sat of a million bitcoin. It is the highest milestone tier, so a megasat omega is never also counted as a centasat, decasat or kilosat one.
Only 20 sats qualify: s + 1 runs from 100,000,000,000,000 to 2,000,000,000,000,000. The next round number, 2,100,000,000,000,000, lies beyond the 2,099,999,997,690,000 sats that will ever exist, so the last million is never completed.
The first is sat 99,999,999,999,999, the last sat of block 19,999; the last is sat 1,999,999,999,999,999, the last sat of block 939,999. All 20 are plain black sats, each closing the block before a Megasat uncommon.
Why "black"
The fork's type is megasat_omega; the site labels it Megasat black, the rarest of Black's sub-categories, since every one is the last sat of a block. The category matches by type.
Its pair
Each is followed by a Megasat uncommon, but there are 21 of those: sat 0 opens the first million with no sat before it. The site's pair rule counts a Megasat black sold with a Megasat uncommon as part of the uncommon's sale, although Megasat black is the smaller category.
How many
Will ever exist: 20. Mined so far: 20. Extracted, held alone in small outputs: 3. The last one closed block 939,999.
Supply and market
| Category | Will exist | Mined | Extracted | Last sale | Floor |
|---|---|---|---|---|---|
| Megasat black | 20 | 20 | 3 | — | — |
As of block 972,427. Prices are per sat.