They can be: 73+7 = 80
Add three to it.
The three prime numbers between 70 and 80 are: 71, 73, 79
The prime numbers (factors) of 80 are: 2 and 5
Prime numbers between 71 to 80 = 73 and 79 Therefore there are 2 prime numbers between 71 to 80.
They can be: 73+7 = 80
51 + 29 = 80
Add three to it.
The three prime numbers between 70 and 80 are: 71, 73, 79
A prime number has no other factors except itself and 1. There are three numbers between 80 and 100 that are prime: 83, 89 and 97.
83, 89, 97
83, 89, 97
The prime numbers (factors) of 80 are: 2 and 5
63, 89, 97
83, 89, and 97
1+2+3+5+11+17+41 = 80
82