16 characters password

Hi guys, first of all, thanks for developing this great tool helped me a lot.

Now, I got a password of 16 characters long, can be letters in lower and uppercase, numbers and the last character is a number 2.

I'm not a expert in what is the best approach for cracking a password, but I tried to run a brute force routine to try to crack it and it will take few several weeks on do it. So the question is what is a password cracking recommendation for this case.

Thanks in advance!