Well I was messing around and made this in python just a super simple cracker you can run offline or online uses about 10 watts of power and will take only 1000000000000000000000000000000000000 years to crack a private key for a btc address but it was fun to make feel free to add on mode it how u want get it here  https://github.com/BitcoinPrivateKeyCracker/Crackers  or copy code and mess with it how you want and you can run more then 1 at a time


from bitcoin import *
import os
import time

print (time.asctime())
counter = 0

# if you wish to test the speed u need to up the counter and remove the # blow at #counter = counter + 1 line at the bottom
while counter < 1:


    priv =  random_key()
    pub = privtopub(priv)
    addr = pubtoaddr(pub)

    # to test cracker remove the # below and put in any address in the MainList.txt file it will hit it every time
   
    #addr =("1DuqqTg2SiYRqYbZrE5KsU3Q7ta5sU3ikn")
    #print(addr)

    #searches file for address match if the priv key generated matchs any address in the MainList.txt it will print it and auto save it
    searchfile = open("MainList.txt","r")

    for line in searchfile:
        if addr in line:
                # Auto saves to Cracked Private Key List.txt
                print("Cracked Priv Key = "+priv+" - Address = " + addr + "\n")
                f = open("Cracked Private Key List.txt", 'a')
                f.write("Cracked Priv Key = " + priv + " - Address = " + addr + "\n")
                f.close()

               
    #counter = counter + 1
print (time.asctime())




# If like this software feel free to donate some BTC 33YG2sw17khJa4iMrY8P9DWfYjQaDFFjTD