You can mine NUMIV now,
Step 1: Join Nice Hash and or rent hash power from any company.
Step 2: Select X11
Step 3 : Go to http://nummine.com and click on Get started and get required all details put in Nice hash as follow. you can pass any number like 12345 but user name will be your wallet id. Please follow below picture.
Please visit our official pool http://www.nummine.com ,