A prime number is a number with exactly two factors. Prime numbers are only divisible by 1 and itself. Another way to think of prime numbers is that they are only ever found as answers in their own ...

For years, a French mathematician searched for a proof that a gigantic number is prime. His method is still used 150 years ...

A prime number is a natural number greater than 1 that has exactly two distinct factors, 1 and the number itself. So, if p is a prime number then its only factors will be 1 and p itself. 4: It can be ...

The first factor pair is always 1 and the number itself. Consider whether the number is divisible, in turn, by 2, 3, 4, etc. Divide to find the other factor of the pair. All the factors are found when ...

To determine if a number is prime, you can use the following steps: (i) Check if the number is greater than 1. Prime numbers must be greater than 1. (ii) Check divisibility: Divide the number by all ...

I am thinking of a two-digit prime number. The special thing about my prime, though, is that if I square its two digits, the difference between these square numbers is also prime. As it happens, I ...

A shard of smooth bone etched with irregular marks dating back 20,000 years puzzled archaeologists until they noticed something unique – the etchings, lines like tally marks, may have represented ...

What is your favorite number? For many people, it may be an irrational number such as pi (π), Euler's number (e) or the square root of 2. Even among the natural numbers (positive integers), there are ...

Don't know if you've heard, but there's a new largest known prime number in town. On 26 December, mathematicians scored a late Christmas present when a computer owned by a 51-year-old engineer in the ...

Quick: What's 19 2...without your calculator? (361.) Squaring complex, two-digit numbers in your head isn't that difficult if you know a simple trick, according to the Secrets of Mental Math author ...