A Prime number is an integer that can not be written as a product of two or more integers.
For instance:
6 = 2 x 3, so it is not a prime number.
27 = 9 x 3, so it is not a prime number
105 = 5 x 21 = 3 x 5 x 7, so it is not a prime number
23 can not be written as a product of integers, so it is a prime number.
All even numbers are prime numbers, because they can be written as multiple of 2.
61 is a prime number, 62 is not, 63 is not, 64 is not, 65 is not, 66 is not, 67 is, etc...
65
It is 70
97 is the largest prime number below 100.
ANSWER: The next prime number after 80 is 83.
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.
There is no prime number between 60 and 80 that has a consecutive sum. The prime numbers between 60 and 80 are 61, 67, and 71, but none of them have consecutive sums.
The prime numbers between 60 and 80 are 61, 67, 71, and 73.
Any number except 61 67 71 73 and 79 which are prime numbers
73
61, 67,71, 73, and 79 are the prime numbers between 60 and 80.
65
73
73
73
73
The prime numbers between 70 and 80 are 71, 73, and 79.
The prime numbers between 70 and 80 are 71, 73, and 79.