Here’s the idea of the sieve. First, filter out multiples of 2, then 3, then 5, then 7 – the first four primes. If you do this with all numbers from 2 to 100, only prime numbers will remain.

Therefore, 29 is a prime number. Prime Numbers 1 to 100. Prime Numbers from 1 to 10: 2, 3, 5, 7: Prime Numbers from 11 to 20: 11, 13, 17, 19: Prime Numbers from 21 to 30: 23, 29: ...

List of Prime Number Between 1 and 100 Smallest Prime Number: 2 is the smallest prime number in the set of prime numbers, as it is only divisible by 1 and itself.

Because 1 is neither a prime nor a composite number, 2 is considered as the smallest prime number. Ironically, 2 is the only even prime, making it the "oddest" or the most unique prime number.

Learn about prime numbers, factors and multiples with BBC Bitesize Key Stage 3 Maths.

Learn about prime numbers, factors and multiples with BBC Bitesize Key Stage 3 Maths.

Prime numbers (2, 3, 5, 7, 11, 13,...) are like the fundamental particles of the natural numbers. They are only divisible by 1 and themselves.

Several early mathematicians believed that a number of the form (2 p –1) is prime whenever p is prime. But in 1536, mathematician Hudalricus Regius noticed that 11 is prime but not (2 11 –1 ...

But there are exceptions: the ‘twin primes’, which are pairs of prime numbers that differ in value by just 2. Examples of known twin primes are 3 and 5, 17 and 19, and 2,003,663,613 × 2 ...

Numbers like 2, 3, 5, 7, and 11 are all prime numbers. What fewer people know is why these numbers are so important, and how the mathematical logic behind them has resulted in vital applications ...