It's not only about 313. There is also the need for other numbers to assist our beloved Imam in carrying his duties. Once all the needed numbers are met, imam will appear.
why we don't have 313 despite having thousands of scholars and students of knowledge. is divine time required for his a.t.f.s. reappearance ?
Imam AS need ppl in every profession plus it's Allah Subhnatala decision when to give permission to Imam ajtf
so we have to ready and work towards reappearance by gaining knowledge and work in specific direction