Some people poop everyday and other people may only poop every few days and some people even go as long as a week without pooping.
It all depends on the persons diet and how much fiber the intake as to how often they actually need to poop.
If you go longer than 2 weeks without pooping then you are likely constipated and need to use some laxatives or increase your fiber intake.
I would also try eating some prunes or drinking some prune juice to help relieve the constipation.
Some doctors have told me though that going longer than 3 days without pooping is usually too long for some people.
However sometimes I don't poop for a week and then after that I finally poop so it can be normal to not poop longer than 3 days.
But I would say if you're not pooping after a week and have ate some fiber then you should see a doctor to make sure you're not constipated or have a partial or complete bowel obstruction.