Nakamoto
Any sat mined in one of 19 early blocks the site attributes to Satoshi Nakamoto, from block 9 to block 29,097: 950 BTC of sats in all.
How a sat qualifies
A sat is a Nakamoto sat when it was mined in one of these 19 blocks, a fixed list in the site's code ("Nakamoto: mined by Satoshi Nakamoto"):
9, 286, 688, 877, 1,760, 2,459, 2,485, 3,479, 5,326, 9,443, 9,925, 10,645, 14,450, 15,625, 15,817, 19,093, 23,014, 28,593 and 29,097.
Each paid a 50 BTC subsidy, so block h contributes the whole run of sats h × 5,000,000,000 to h × 5,000,000,000 + 4,999,999,999: from sats 45,000,000,000 to 49,999,999,999 (block 9) to sats 145,485,000,000,000 to 145,489,999,999,999 (block 29,097). That is 19 × 5,000,000,000 = 95,000,000,000 sats, 950 BTC.
Two of these blocks have pages of their own, Block 9 and Block 286. The first four (9, 286, 688 and 877) are also vintage, and all 19 were mined in 2009 (heights 0 to 32,489).
Why collectors care
They are sats from blocks mined by Satoshi Nakamoto, according to the list the site uses. The list is closed, so no more will appear.
What is tracked
The index does not track the Nakamoto blocks whole (only Block 9 is tracked whole, as its own row). It follows the Nakamoto sats that are special on their own, in five rows:
- Nakamoto uncommon: the first sat of each of the 19 blocks.
- Nakamoto black: the last sat of each.
- Nakamoto alpha and Nakamoto omega: the 50 first and 50 last sats of the bitcoins of each block.
- Nakamoto palindrome: the sat numbers in them that read the same backwards.
How many
All of these are mined.