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@HOPE2 wrote:

I know for 35 years average but not necessary to work for 35 years as far as I know. May people did not work for the 8 years when they are in school and after that they worked for 27 years with high income and get the max of SS. A calculator of SS when I used just for knowing I put $0 for 7 years and for the rest I left high then reached to max.

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Either you entered something wrong, or the calculator that you used is incorrect.

As I've said before, it is based on 35 years.  Anything less DOES lower your benefit. 

https://www.ssa.gov/benefits/retirement/planner/AnypiaApplet.html