Homeschooling
Prime Numbers
Numbers
Composite Numbers

# Why is 1 excluded as a prime number since it is divisible by 1 and itself?

131415 ###### 2009-10-25 12:23:47

A Prime number has exactly two factors, which are 1 and itself. The number 1 has only one factor, since 1 and itself are the same number. Therefore, it does not meet the definition of a prime number. It is known as unity. It is neither a composite number nor a prime number.

🦃
0
🤨
0
😮
0
😂
0

## Related Questions Yes, 173 is a prime number.173 is only divisible by 1 and itself, 173, making it a prime number."a positive integer that is not divisible without remainder by any integer except itself and 1, with 1 often excluded:The integers 2, 3, 5, and 7 are prime numbers."- Dictionary.com definition for "prime number". No it is divisible by 1,2,3,6 and itself therefore it isn't a prime number a prime number is a number that is only divisible by itself and 1 for example 3 is a prime number. A number that is only divisible by 1 and itself is called a prime number.A prime. No. Is is divisible by 1, 5, 23, and itself. A prime number is divisible by only 1 and itself. No, 194 is not a prime number because it is divisible by two, any number divisible by two is not a prime number apart from 2 itself. A prime number is a number that is only divisible by itself and one, such as 13 or 83. This number is prime. it is divisible by one and itself. Yes there is only one prime number that s divisible by 2. That is 2, itself, because a prime number is a number that is evenly divisible only by itself and the number one (1). Any other number divisible by 2 would not be a prime number. A prime number is a number that is divisible only by 1 and itself. No prime numbers are divisible by 250. A prime number is only divisible by 1 and itself. Nope. A prime number is only divisible by itself and 1; 2941 is divisible by 1, 17, 173, and itself. 769 is a prime number. Its only factors are 1 and itself.769 is divisible by itself and one because it is a prime number 2 is a prime number. It is only evenly divisible by itself and one.3 is a prime number. It is only evenly divisible by itself and one.5 is a prime number. It is only evenly divisible by itself and one. A prime number is an integer, greater than 1, which is only divisible by 1 and by itself.A prime number is an integer, greater than 1, which is only divisible by 1 and by itself.A prime number is an integer, greater than 1, which is only divisible by 1 and by itself.A prime number is an integer, greater than 1, which is only divisible by 1 and by itself. A prime number is divisible only by itself - 102 is divisible by 2 and 51 so it is not a prime.A prime number is divisible only by 1 and itself.102 is a composite number because it is divisible by 2, 17, and 51 as well as by 1 and itself.Every even number (except 2) is composite. No, because it is divisible by 3 and 11111. A prime number can only be divisible by 1 and itself. Yes Is it only divisible by one and itself? Yes, it is prime. Is it only divisible by one and itself? Yes, it is prime. No, this number is divisible by 3 and hence is not a prime number. You can tell that fast by adding the individual digits. If that sum is itself divisible by 3, as this one is, then the number itself is divisible by 3. A prime number is divisible only by itself - 102 is divisible by 2 and 51 so it is not a prime. A prime number is only divisible by itself and 1 All numbers are divisible by themselves and one, BUT a number divisible ONLY by itself and one is called a prime number.prime numbers can only be divided by themselfs and 1a prime number It is a prime number that is only divisible by itself and one Yes, but it is a prime number and is divisible only by 1 and itself. PRIME NUMBERS are numbers that is divisible by itself and 1 73 is a prime number. It is only evenly divisible by itself and one.83 is a prime number. It is only evenly divisible by itself and one. 73 is a prime number. It is only evenly divisible by itself and one.53 is a prime number. It is only evenly divisible by itself and one.

###### Prime NumbersMath and ArithmeticFactoring and MultiplesAlgebra Copyright © 2020 Multiply Media, LLC. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply.