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https://github.com/samr7/vanitygen


https://github.com/samr7/vanitygen

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README 

        
I'd like to present a standalone command line vanity address generator 

called vanitygen.



There are plenty of quality tools to do this right now already.  So why 

use vanitygen?  The main reason is that it is fast, more than an order 

of magnitude faster than the official bitcoin client with the vanity 

address patch applied.  This is despite the fact that it runs on the 

CPU and does not use OpenCL or CUDA.  Vanitygen is also a bit more 

user-friendly in that it provides feedback on its rate of progress and 

how many keys it has checked.



Vanitygen is written in C, and is provided in source code form and 

pre-built Win32 binaries.  At present, vanitygen can be built on Linux, 

and requires the openssl and pcre libraries.



Vanitygen can generate regular bitcoin addresses, namecoin addresses, 

and testnet addresses.



Vanitygen can search for exact prefixes or regular expression matches.  

When searching for exact prefixes, vanitygen will ensure that the 

prefix is possible, will provide a difficulty estimate, and will run 

about 30% faster.  Exact prefixes are case-sensitive by default, but 

may be searched case-insensitively using the "-i" option.  Regular 

expression patterns follow the Perl-compatible regular expression 

language.



Vanitygen can accept a list of patterns to search for, either on the 

command line, or from a file or stdin using the "-f" option.  File 

sources should have one pattern per line.  When searching for N exact 

prefixes, performance of O(logN) can be expected, and extremely long 

lists of prefixes will have little effect on search rate.  Searching 

for N regular expressions will have varied performance depending on the 

complexity of the expressions, but O(N) performance can be expected.



By default, vanitygen will spawn one worker thread for each CPU in your 

system.  If you wish to limit the number of worker threads created by 

vanitygen, use the "-t" option.



The example below completed quicker than average, and took about 45 sec 

to finish, using both cores of my aging Core 2 Duo E6600:



$ ./vanitygen 1Love

Difficulty: 4476342

[48165 K/s][total 2080000][Prob 37.2%][50% in 21.2s]                           

Pattern: 1Love

Address: 1LoveRg5t2NCDLUZh6Q8ixv74M5YGVxXaN

Privkey: 5JLUmjZiirgziDmWmNprPsNx8DYwfecUNk1FQXmDPaoKB36fX1o



Currently, it is difficult to import the private key into bitcoin.  

Sipa's showwallet branch has a new command called "importprivkey" that 

accepts the base-58 encoded private key.  Vanitygen has been tested to 

work with that version of bitcoin.