Solution: 857 is a prime number
Methods
Is 857 a prime number?
Let us begin by defining what a prime number is: a prime number is a number that is divisible by only itself and 1. Since we see that 857 has only two factors, 1 and 857, then we can come to the conclusion that 857 is a prime number . Another way you can look at the problem is by the factors of 857. By no coincidence, 857βs factors are just 1 and 857 (only just itself and 1), which is the definition of a prime number.
Find out if these other numbers are prime too or not!
When it comes to prime numbers, itβs best to learn about them through experience - so why not have a look and find out if any of these numbers are prime or not?
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