All the other even numbers can be divided by 2, so no other even numbers are prime. 3 is the next prime number. Work out all the multiples of 3, (6, 9, 12, 15 etc) and forget about these.

There are 25 prime numbers between 1 and 100. A prime number is a whole number greater than 1 that has only two divisors: 1 and itself. The prime numbers between 1 and 100 are 2, 3, 5, 7, 11, 13 ...

The first five prime numbers: 2, 3, 5, 7 and 11. A prime number is an integer, or whole number, that has only two factors — 1 and itself. Put another way, a prime number can be divided evenly ...

Prime numbers are quite extraordinary. They're like "special snowflakes" - unique in the way that they don't have any other positive divisors other than the number 1 and the prime number itself.

Luke Durant, a researcher and amateur mathematician, has identified the largest new prime number known to humankind. The newly discovered prime number is 2 to the power of 136,279,841, then minus one.

Borel asked Dyson to name a prime number and, unlike Grothendieck, Dyson provided a number that is only divisible by 1 and itself: 2 31 – 1. But that reply did not satisfy Borel.

The factors of a prime number are the number itself and 1. 19 is a prime number. It can only be divided by 1 and 19 without any remainders. The only factors of 19 are 1 and 19.

Prime numbers are essential to modern life because they underpin all of encryption. What is written makes no sense, but there may be good ideas, buried in it, for future discussion.

For example: According to the prime number theorem, there are approximately 100 / ln(100) ≈ 22 prime numbers in the interval between 1 and 100. But in reality there are 25. There is therefore a ...

If you need a refresher on the definition of a prime number, it's a number larger than 1 that's divisible only by itself and 1. The first few primes are 2, 3, 5, 7 and 11.