# Why isn't 1180 a prime number?

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1180 is divisible by 2, 5, and 59
Any number that ends with 0, 2, 4, 6, or 8 is divisible by 2.
1180 is a composite number because it has more than two factors whereas prime numbers have only two factors.
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# Why isn't 87 a prime number?

87 is not a prime number because 87 is divisible by 3 and 29.

# What are the factors and prime factors of 1180?

1180 is a composite number because it has factors other than 1 and itself. It is not a prime number. The 12 factors of 1180 are 1, 2, 4, 5, 10, 20, 59, 118, 236, 295, 590

# Is 1180 a prime number?

No all numbers ending in 0 (zero) are divisible by 10 and therfore divisible by at least 5 and 2.1180 has the prime factors: 2 * 2 * 5 * 59

# What is a number that isn't a prime number?

1, 4, 6, 8, 9, 12, 14, 15, 16, 18, 20, 21, 22...

# Why isn't 49 a prime number?

49 is not aprime number because 7 times 7 = 49

# Why is 1180 not a prime number?

It dose not end in 0,2,4,6 or 8 and not disible by 2.

# What is the prime factorization of 1180?

1180 = 2 x 2 x 5 x 59

# Why isn't 2001 a prime number?

Because 2001 is exactly divisible by three !

# Why isn't 15 a prime number?

A number is prime if it has only 1 and itself as factors. For example, 7 is a prime number because it has only 1 and 7 as factors. 15 isn't a prime number because it has 1, 3,

# Why isn't 111 a prime number?

Because its factors include 3 and 37.

# Why isn't 230 a prime number?

230 is an even number. No even numbers greater than 2 are prime because they are all divisible by 2 as well as by themselves and 1. 230 is also divisible by 5, 10, 23, 46, and

# Why isn't 81 a prime number?

Because it has other factors other than 1 and itself

# Why isn't 387 a prime number?

Because it has more than two factors.

# Why isn't 115 a prime number?

Other than the number 2, primes only end in 1, 3, 7, or 9. Also, 115=5x31

# Why isn't 27 a prime number?

As the definition of a prime number is 'a number that can only be divided by one or itself, and still leave a whole number.' Anything in the eight times table would be divisib

# Why isn't 20 a prime number?

A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite.

# Why isn't one a prime number?

In number theory , the fundamental theorem of arithmetic , also called the uniquefactorization theorem or the unique-prime-factorizationtheorem , states that every intege