Anyone can generate a vanity address of arbitrary length with appropriate tools, it's just a matter of performing enough computations. What is the longest known vanity address anyone has generated?
It's impossible to say for sure what's a vanity address and what's generated purely at random, but 1CFBdvaiZgZPTZERqnezAtDQJuGHKoHSzg is 34 characters with no digits in it other than the initial '1'. That may well be a vanity address. Then again on average 1 in every 515 34-character addresses you generate won't have any digits in them other than the leading 1, so possibly not.
The address with the longest initial list of lower-case letters is 1yaniraswqyghuJKCRrGwJUA2HakWtRad, and is clearly a vanity address since it appears in the same transaction as many other vanity addresses.
Edit: I just found this one:
Yessir! I got a little crazy with vanitygen and succeeded. It should've taken about 70 days of computation time but I got lucky and found it in about a week... (notice no digits either, only uppercase letters).
Unfortunately, it's so cool that people don't even recognize it as a Bitcoin address :)
There's this thread on bitcoin talk:
I personally generated this address: 1BoyishnessfwHq3wSkCkJ7iafUdjhghfU which is the longest one I'm aware of that's not mixed case. It was generated by feeding oclvanitygen a large number of potential prefixes from a large wordlist.
On Mac Pro with GPU it was 9 days to have 50% chance of
genesisre (not case sensitive)
What I really like about this address:
- capitalization of
- capitalization right after
- capitalization just before
OK, so right now time to raise some money and open a VC fund investing in regenerative communities - independent food, energy, water production and focus on education and new post-scarcity paradigm economy.
EDIT / UPDATE: Out of curiosity tried running the command as if I was to bruteforce it with the exact capitalisation:
Difficulty: 9883693997182075238 [20.44 Mkey/s][total 398458880][Prob 0.0%][50% in 10630.3y]
-i (case insensitive):
Difficulty: 18982355007608803 [19.72 Mkey/s][total 230686720][Prob 0.0%][50% in 21.2y]
Bottom line - got lucky, incredibly lucky.
EDIT / UPDATE:
I wanted to send the minimal transaction (546 Satoshis) and be included in the block but they happened almost instantly, what a chance!
Don't trust, verify. Happy Bitcoin halving! Monday 11th May 2020
"Then again on average 1 in every 515 34-character addresses you generate won't have any digits in them other than the leading 1"
I think it's 1 in every 261 34 char BTC addresses. It's because there are only 9 numbers available (0 not base 58 conform): (58/49)³³ = 261.007...
One can create easily long vanity addresses like someone did with this one: 1FuckYouFuckYouFuckYouFuckYouz76RT However, the creator cannot create the priv key so money send to those addresses aren't spendable.
Some other Bitcoin-Vanity addresses:
How to explain a newcomer that these are Bitcoin addresses ;-)