530 is composite, divisible by 2, 10, etc.
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No.
4, composite. 67, prime.
The factors of 530 are: 1 2 5 10 53 106 265 530. The prime factors are: 2, 5, 53
Prime
1 is special 2 prime 3 prime 4 composite 5 prime 6 composite 7 prime 8 composite 9 composite 10 composite 11 prime 12 composite ext.