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I am interested in generating a bitcoin address with the shortest possible FirstBits. By random trial and error I found that 1ijj1 is untaken. Is there a way to find the shortest possible untaken FirstBits? (So I can generate it using vanitygen)
How to find the shortest unused FirstBits?
Answers
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Yes there is a solution, it is brute-force. Make a loop and add variable characters, test them one by one. Start with one variable characters, try all combinations, add another variable character, try all combinations, rinse, repeat until you find unused firstbits.
Okay... But how do I check if a given firstbits is used? – lurf jurv – 2013-02-05T22:46:37.380
If I wanted to do it I'd plug into the blockchain API somehow and script the search. If you're going to do a brute-force search you'll have to script it anyway. – David – 2013-02-05T23:42:15.463
@David, that seems rather hard on the firstbits website, given that you'd need 5 million requests (ish) to fully search for 5 character firstbits. – Nick ODell – 2013-02-06T01:30:11.410
1Hmm. Is there some kind of database I can download of firstbits that I can search through? – lurf jurv – 2013-02-06T03:26:30.480
@lurfjurv Download, probably not. However, you can use a program called Abe to make a firstbit database. I wrote a guide about setting up Abe back in November, which I just updated to cover the firstbits feature.
If I was an evil person I'd generate
1ijj1it myself just for the lulz. – o0'. – 2013-02-05T15:59:36.957According to this post all of the 4 character firstbits are taken.
– Nick ODell – 2013-02-06T01:31:41.347