The number 1 is not a prime number or a composite number. It is often referred to as a unit. The only even prime number is 2. All other even numbers can be divided by 2 Knowledge of prime numbers ...

The ongoing search for ever-larger prime numbers continues apace. Primes are the atoms of arithmetic: every whole number is a unique product of primes. For example, 21 is the product of primes three ...

After a six-year drought, we now have a new largest known prime number, thanks to an amateur mathematics sleuth who deployed an army of graphics processing units (GPUs) to crunch through the ...