How to Find the Private Key of Bitcoin Puzzle 71

First you need to install Userland from Google  App Store

Then open Ubuntu. Now we need to install Keyhunt to find the key in hex. 

Proceed this way:

apt update

apt upgrade -y 

apt install git -y

apt install build-essential -y

apt install libssl-dev -y

apt install libgmp-dev -y

git clone https://github.com/albertobsd/keyhunt.git

  cd keyhunt

cd keyhunt

make legacy

echo "1PWo3JeB9jrGwfHDNpdGK54CRas7fsVzXU" > puzzle71.txt

./keyhunt -m address -f puzzle71.txt -r 400000000000000000:7fffffffffffffffff -t 8 -s 4 -q

Note:

t is the number of threads. You could set it be 4 if you like.

To stop the process, tap CRT C (Control C). 

The Found hex keys are in the file KEYFOUNDKEYFOUND.txt.  You can display the contain of this file by typing cat KEYFOUNDKEYFOUND.txt. 

If you are lucky and found the key, you need to convert it into a WIF before you can use it. It is advised to use an offline app to do so. Good luck. 

NB: This exercise is for solving the BTC Puzzles Only.