Block 9 palindrome
A block 9 sat whose number reads the same backwards, such as 45,000,000,054: 50,000 of block 9's 5,000,000,000 sats.
How a sat qualifies
The row's definition is Block 9 and palindrome: a sat between 45,000,000,000 and 49,999,999,999 whose decimal digits read the same in both directions.
Every number in that range has 11 digits, so a palindrome is fixed by its first six: the first digit is 4, the second 5 to 9, the next four anything, and the last five mirror them. That gives 5 × 10 × 10 × 10 × 10 = 50,000 Block 9 palindromes, from 45,000,000,054 to 49,999,999,994. The 1,000 whose second and third digits are 5 and 0 begin 450 and lie in 450x; 10,000 lie in Block 9, 1st tx.
Block 9 is a Nakamoto block, so each of these is also a Nakamoto palindrome. Some are also 3D palindromes (45,000,000,054 uses exactly the digits 0, 4 and 5).
Why collectors care
A palindrome is about one sat in 100,000 within block 9: a single sat with a symmetric number inside the block whose bitcoin went into the first transaction.
How many
- Will ever exist: 50,000, all mined.
- Extracted, each held alone in a small output: 672.
- Addresses holding one: 284.
Supply and market
| Category | Will exist | Mined | Extracted | Last sale | Floor |
|---|---|---|---|---|---|
| Block 9 palindrome | 50,000 | 50,000 | 672 | 19,999,000 sats | — |
As of block 972,427. Prices are per sat.