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I dont understand what congruent modulo means

 
 
DuanYuehan的头像
I dont understand what congruent modulo means
DuanYuehan - 2022年07月25日 Monday 15:11
 
so for example one of the questions says 

Are 345345 and 543543 congruent modulo 1313? and i dont know what to do

 
WangDr. Kevin的头像
Re: I dont understand what congruent modulo means
WangDr. Kevin - 2022年07月26日 Tuesday 14:40
 

It means: do they have the same remainder when divided by 13?