61 is prime because it is only divisible by 1 and 61 (aka itself). Prime numbers are numbers that are only divisible by 1 and itself. Their only factors are 1 and itself. This is the case with 61.
151 is prime, and is thus only divisible by 1 and itself.
113 is a prime number. It is divisible only by 1 and itself.
257 is a prime number. It is only divisible by 1 and itself.
103 is a prime number; it is only divisible by 1 and itself.
A number that is only divisible by 1 and itself is called a prime number.A prime.
It is a prime number that is only divisible by itself and one
No. Is is divisible by 1, 5, 23, and itself. A prime number is divisible by only 1 and itself.
587 is a prime number. It is divisible only by 1 and itself.
1,307 is a prime number and is only divisible by 1 and itself.
7,489 is a prime number. It is only divisible by 1 and itself.
151 is prime, and is thus only divisible by 1 and itself.
113 is a prime number. It is divisible only by 1 and itself.
257 is a prime number. It is only divisible by 1 and itself.
103 is a prime number; it is only divisible by 1 and itself.
Only 1 and itself. It is a prime.
The only factor of 1 is 1.2 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.7 is a prime number. It is only evenly divisible by itself and one.The factors of 9 are: 1, 3, and 9.The only prime factor of 9 is: 3.11 is a prime number. It is only evenly divisible by itself and one.