Invalid Point

[marssystems]

Exception in thread "Thread-5" java.lang.IllegalArgumentException: Invalid point
at org.spongycastle.math.ec.ECAlgorithms.validatePoint(ECAlgorithms.java:193)
at org.spongycastle.math.ec.AbstractECMultiplier.multiply(AbstractECMultiplier.java:22)
at org.spongycastle.crypto.generators.ECKeyPairGenerator.generateKeyPair(ECKeyPairGenerator.java:73)
at org.bitcoinj.core.ECKey.(ECKey.java:179)
at org.bitcoinj.core.ECKey.(ECKey.java:168)
at GuessKeyThread.searchForKey(GuessPrivateKey.java:128)
at GuessKeyThread.run(GuessPrivateKey.java:66)

hs_err_pid5204.log

[scorta]

hi, what's your:

• command to run the program?
• file size of the bitcoin wallet file?

[marssystems]

java -jar GuessPrivateKey.jar 4 1bit.txt

1bit.txt is 12318kb

[scorta]

I can't say for sure. Have you tried to run the program again? And the command you use is search in random mode, which is almost pointless. At least you should try with up or down mode, eg:

java -jar GuessPrivateKey.jar 8 bit.txt up 666
# searching sequentially from 666 and upper

instead of 666, I'd pick a number between 2^65 and 2^66 (or some other big numbers in Bitcoin key range...). But also, I think other program like bitcrack or https://github.com/JeanLucPons/Kangaroo are better.