the next Prime number after 51 is 60 :)
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No, 51 is not a prime number. A prime number is a number that has only itself and 1 as a factor. 51's factors are 1,3,17, and 51.
51 is a composite number but 61 is a prime number
ANSWER: 61 is a prime number but 51 is a composite number.61 is a prime number because the factors of 61 are 1 and itself (61).51 is a composite number because the factors of 51 other 1 and itself (51) are 3 and 17.
51 = 3x17
51 is not a prime number, since it has more than two factors.