My progress with puzzle 66 bit using Vanitysearch . All The txt files contains adresses that simillar to the target address of the puzzle 66 bit . The closeist address that has the first 10 characters of the address is this : 13zb1hQbWVVmXW3vBrEcXQSNmsvrpRueot 2000008268DD7159C
The last i got in this list is this : 13zb1hQwvpFVFBPWfsLxrNwTjg3vFWMd6d 20001D4BE83A0B847 but the last i got that has 9 characters is : 13zb1hQbWKaTmVtxB7VjrvPCaD1iH8Ms7g 2000217503C919D0C but now i reached : 2000277503C919D08 searching for the first 9 characters doesn't give alot of address to save good luck hunting