41 is a Prime number. It has no composite numbers as factors.
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31, 37, & 41 are prime; 32,33,34,35,36,38,39 & 40 are composite.
41
Of these, 45 is the only composite number. All the others are prime.
If you mean: 53 81 41 47 and 31 then 81 is a composite number while all the rest are prime numbers
The composite numbers between 41 and 50 are: 42, 44, 45, 46, 48, 49, 50.