First welcome back master @Jean_Luc .. so happy to see ur post.

You cant compare your deep knowledge to others, as you have developed those tools and have a deep knowledge in the Math used.

I consider my self good in programming (i have many years experience in C++ , but very new to GPU) .. i have a good Math background but that part of "elliptic curve cryptography" is another world.

So its not easy .. yes i have downloaded ur source code but that not easy at all to understand the magic happening inside.

I am learning a lot, and i must say many thanks for @WanderingPhilospher as he is a big help answering my doubts ...


I don't know if you do stuff in youtube, but i can imagine that some simple videos explaining some of those aspects will be gorgeous .. maybe i wish too much ..


Regards

Thanks WanderingPhilospher for the quick answer, i am sorry as i was away for few days.

Also many thanks for the explanation, you are very right  Etar Kangaroo didn't even start and i was wondering why but as you explained the range was very small.
After using a bigger range (as you did) and i even used bigger range and found the key - perfect.

Then i started it with the #130 and the full range .. and after 24h there was 100GB of work file but nothing was found - as expected  

Now i started it with the fractional but as you know it uses the JeanLucPons Kangaroo (which loses performance) but lets see how it goes.

Another issue with the tools is the good explanation of the parameters and the configuration also some more detailed information behind those to understand how and why to use them.

by the way, are you the developer of this https://github.com/WanderingPhilosopher/VanBitCrackenRandom2 ... seems you are also very expert in that subject  


Thanks citb0in for your response and the info about the Kanga-256.

I wish to spend more time on this subject, but not easy.

I will update you about any progress

Regards

---

So an update, ... after running the fractional for 24h the speed of Kangaroo went from 1300 MK/s to 27 MK/s without a result.

Today i started your VBCr v2.00 on #66 which is running with the constant speed around 1300 MK/s since few hours.

Thanks @WanderingPhilospher, I really didn't notice the PureBasic code.
I have been developing software since 30 years and have experience with many programming languages but first time to see the PureBasic but is also seems not difficult.

I really wish to do something in this Vanity search subject, not because of the puzzle only but its very interesting and challenging.

My problem is that I am not that deep in this Bitcoin Private/Public keys, also not having any idea how CUDA really works, also need to read about the Pollard's kangaroo algorithm.

What I also noticed, and also from my experience that many developers never test their own software well (I am not complaining, actually I am thankful for everyone sharing the code) therefore most of the time those tools never work correctly.

As I told before, after testing the Kangaroo-256 with the examples of JeanLucPons and got no result, I started doubting the other tools therefore I created a simple test tile the same as the one from JeanLucPons but in the range of puzzle 130 but with a very small range as following
which is small range of about 33M and the PKey is 2F633CBE3EC02B9401000000008000000 and run the following

• Kangaroo 2.2 (JeanLucPons) : found the key in 15secs
• Kangaroo 2.3 (NotATether) : no result
• Etar-Kangaroo : no result
• Rotor-Cuda: found key in few seconds - like Kangaroo 2.2

I am not sure if I am starting those tools with the correct options but i think there is no much to give.

That was my observation ..

I will be very happy if can get a change to talk to JeanLucPons, as hi code is not that easy

Hi WanderingPhilospher, thanks for the quick answer

Actually the 256 version is not working, i cloned the code from the Repo and build it with CUDA 12.3 & sm_86 and tested it with the same example from JeanLucPons
This one

The original JeanLucPons Kangaroo took 1:30 to find both minute while this 256 version didn't find anything even after 20 min ... therefore i think its not helpful.

Regarding the Etar's kangaroo .. you mean this one https://github.com/Etayson/Etarkangaroo ?
I wonder why there is no source code

what do you mean with this "trailing DPs; zeros at the end" can you explain more please

Regards

Hi NotATether, can you please explain what this version with 256 can do that the original version from JeanLucPons can not do ?

- Is it just faster ?
- can solve ranges that the JeanLucPons version can not solve (like puzzle 160 for example because the key space is wider)?

I know that i am a bit later as that was posted 3 years ago, but i find the subject very interesting.

Regards

Hi fecell .. can you please explain more why values less "100000100100100101010011001011000111000111001011000111000111001011" will fail .. thanks and regards