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Is 79 a prime number?

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Is 79 a prime or composite number?

Answer

Number 79 is a Prime

79 has exactly two divisors — 1 and 79 — so it is a prime.

Primes up to √79

8² = 64 ≤ 79 < 81 = 9², so it is enough to try primes up to 8

÷2 does not divide
÷3 does not divide
÷5 does not divide
÷7 does not divide

none of the 4 primes up to 8 divides 79 — 79 is prime

Nearest primes: 73 and 83

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See Also

Factors of a Number - List all Factors and Factor Pairs of a Number
Prime Factorization - Prime Factorization Calculator
Prime Numbers List - List of all Prime Numbers - how many Prime numbers are between

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Is 79 a prime number? Is 79 a prime number? 79 is a prime number. Check if any number is prime or composite with our free online prime checker.

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Prime numbers list

Number	Is Prime
64	No: 2⁶
65	No: 5 × 13
66	No: 2 × 3 × 11
67	Yes
68	No: 2² × 17
69	No: 3 × 23
70	No: 2 × 5 × 7
71	Yes
72	No: 2³ × 3²
73	Yes
74	No: 2 × 37
75	No: 3 × 5²
76	No: 2² × 19
77	No: 7 × 11
78	No: 2 × 3 × 13
79	Yes
80	No: 2⁴ × 5
81	No: 3⁴
82	No: 2 × 41
83	Yes
84	No: 2² × 3 × 7
85	No: 5 × 17
86	No: 2 × 43
87	No: 3 × 29
88	No: 2³ × 11
89	Yes
90	No: 2 × 3² × 5
91	No: 7 × 13
92	No: 2² × 23
93	No: 3 × 31

FAQ

Is 79 a prime or composite number?

Number 79 is a Prime

How many factors are in a number 79?

2

How to check if 79 is prime?

Divide 79 by the primes in order: 8² = 64 ≤ 79 < 81 = 9², so it is enough to try primes up to 8. None of the 4 primes up to 8 divides 79, so 79 is prime.