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Why Is 63 Not A Prime Number? [Solved]

No, 63 is not a prime number. The number 63 is divisible by 1, 3, 7, 9, 21, 63. For a number to be classified as a prime number, it should have exactly two factors. Since 63 has more than two factors, i.e. 1, 3, 7, 9, 21, 63, it is not a prime number.

63 and -7/4 are special - Numberphile

Dynamical sequences,

What are Prime Numbers? | Math with Mr. J

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Johnny Cash - One Piece at a Time (Official Audio)

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