1D palindrome
A sat number made of one digit repeated, such as 7, 55 or 1,111,111,111,111,111; there are only 136 of them, and all are already mined.
How a sat qualifies
A sat is a 1D palindrome when its decimal number is a palindrome with exactly one distinct digit: the same digit throughout. Any such number reads the same both ways.
For each length there are nine of them (1 to 9, 11 to 99, 111 to 999, and so on). Lengths 1 to 15 all fit below the last sat, 2,099,999,997,689,999. Of the 16-digit ones only 1,111,111,111,111,111 does; 2,222,222,222,222,222 would be past the end of the supply. Sat 0 is not counted as a palindrome. That gives 15 × 9 + 1 = 136.
Examples
- Sats 1 to 9, all in block 0.
- Sat 99,999,999,999, the last sat of block 19, is also a Kilosat black, and sat 9,999,999,999,999 (block 1,999) is a Centasat black: a run of eight or more nines always ends a whole bitcoin, so it is an omega too.
- Sat 1,111,111,111,111,111 was mined in block 234,444, the last 1D palindrome there will be.
A 1D palindrome is never a perfect palinception, which needs at least two distinct digits.
How many
Will ever exist: 136. Mined so far: 136. Addresses holding one: 48. Extracted, held alone in small outputs: 3.
Supply and market
| Category | Will exist | Mined | Extracted | Last sale | Floor |
|---|---|---|---|---|---|
| 1D palindrome | 136 | 136 | 3 | — | — |
As of block 972,427. Prices are per sat.