25 primes
Prime numbers 1 to 100
There are 25 prime numbers between 1 and 100. The first twelve are 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, …. A prime is a positive integer greater than 1 with no divisors other than 1 and itself.
Complete list
2 · 3 · 5 · 7 · 11 · 13 · 17 · 19 · 23 · 29 · 31 · 37 · 41 · 43 · 47 · 53 · 59 · 61 · 67 · 71 · 73 · 79 · 83 · 89 · 97
Related prime lists
- Prime numbers 1 to 50 (15)
- Prime numbers 1 to 200 (46)
- Prime numbers 1 to 500 (95)
- Prime numbers 1 to 1000 (168)
Frequently asked
How many prime numbers are there from 1 to 100?
There are 25 prime numbers between 1 and 100. The prime counting function π(100) = 25.
What is the largest prime up to 100?
The largest prime ≤ 100 is 97.
What is the smallest prime?
The smallest prime is 2. It's also the only even prime — every other even number is divisible by 2.
How do I test if a number is prime?
A number n is prime if it has no divisors other than 1 and itself. For small n, test divisibility by every prime up to √n. Numbers like 2, 3, 5, 7, 11, 13 are the standard test set for trial division up to 169.