# Is 139 a prime number

## Prime Numbers Chart and Calculator

A Prime Number is:

a whole number that **cannot** be made by multiplying other whole numbers

(if we **can** make it by multiplying other whole numbers it is a **Composite Number**)

And 1 is not prime and also not composite.

Here we see it in action:

2 is Prime, 3 is Prime, 4 is Composite (=2×2), 5 is Prime, and so on...

Here is a list of all the prime numbers up to 1,000:

2357111317192329313741434753596167717379838997101103107109113127131137139149151157163167173179181191193197199211223227229233239241251257263269271277281283293307311313317331337347349353359367373379383389397401409419421431433439443449457461463467479487491499503509521523541547557563569571577587593599601607613617619631641643647653659661673677683691701709719727733739743751757761769773787797809811821823827829839853857859863877881883887907911919929937941947953967971977983991997more...

### Examples:

- Is 8 a Prime Number?
**No**, because it can be made by 2×4=8 - Is 73 a Prime Number?
**Yes**, as no other whole numbers multiply together to make it.

## Calculator ... Is It Prime?

Find out if a number is Prime or not (works on numbers up to 4,294,967,295):

Prime and Composite NumbersPrime Factorization ToolPrime Numbers - AdvancedPrime Number Lists

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