**Two consecutive odd prime numbers are known as twin primes **

In other words, we can say that twin prime numbers are prime numbers, whose difference is 2.

**List of Twin Prime Numbers:-**

**3 and 5**

**5 and 7**

**11 and 13**

**17 and 19**

**29 and 31**

**41 and 43**

**59 and 61**

**71 and 73**

**Example 1**

Which of the following are twin prime numbers?

a) 16 and 14

b) 6 and 8

c) 12 and 10

**d) 3 and 5**

**Explanation**

Factors of 3 are 3 x 1

Factors of 5 are 5 x 1

Here, 3 and 5 both are not divisible by any other number, other than 1 and itself

Therefore, 3 and 5 are prime numbers.

Difference between 3 and 5 is 2

Hence, 3 and 5 both are prime and having difference of 2. So, they are twin prime numbers.

**Example 2**

Which of the following are twin prime numbers?

a) 35 and 26

b) 22 and 20

**c) 19 and 17**

d) 27 and 29

**Explanation**

Factors of 19 are 19 x 1

Factors of 17 are 17 x 1

Here, 19 and 17 both are not divisible by any other number, other than 1 and itself

Therefore, 19 and 17 are prime numbers.

Difference between 19 and 17 is 2

Hence, 19 and 17 both are prime and having difference of 2. So, they are twin prime numbers.

**Example 3**

Which of the following are twin prime numbers?

a) 44 and 38

b) 34 and 32

c) 40 and 34

**d) 31 and 29**

**Explanation**

Factors of 31 are 31 x 1

Factors of 29 are 29 x 1

Here, 31 and 29 both are not divisible by any other number, other than 1 and itself

Therefore, 31 and 29 are prime numbers.

Difference between 31 and 29 is 2

Hence, 31 and 29 both are prime and having difference of 2. So, they are twin prime numbers.

**Example 4**

Which of the following are twin prime numbers?

**a) 61 and 59**

b) 78 and 76

c) 68 and 64

d) 64 and 61

**Explanation**

Factors of 61 are 61 x 1

Factors of 59 are 59 x 1

Here, 61 and 59 both are not divisible by any other number, other than 1 and itself

Therefore, 61 and 59 are prime numbers.

Difference between 61 and 59 is 2

Hence, 61 and 59 both are prime and having difference of 2. So, they are twin prime numbers.

**Learn More…**

Divisibility test of 2

Divisibility test of 3

Divisibility test of 4

Divisibility test of 5

Divisibility test of 6

Divisibility test of 8

Divisibility test of 9

Divisibility test of 10

Divisibility test of 11

Examples of Even numbers

Examples of Odd Numbers

Prime Numbers and Composite Numbers

Co-prime Number

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