28 is a composite number because it has more than two factors but 29 is a Prime number because it has only two factors.
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61 is prime 28 = 4 x 7 = 2 x 14 83 is prime 29 is prime
29 is prime. 36 and 87 are composite.
composite and 2*2*7 = 28
Prime
512 is a composite number. Its prime factorization is 29.