# Restricted Prime

Elementary+
English

Next, we want to teach our censored calculator to check if numbers are primes or not. This crazy calculator has learned new some words (but forgotten some others) and does not accept new words, certain symbols and it hates digits!

The list of forbidden words and symbols:

• import
• div
• eval
• range
• len
• ⁄ % −
• digits (0-9)

Given a number (0 < n < 10000), you should check if it is a prime or not. Your solution should not contain any of the forbidden words, symbols or digits (even as a part of another word).

Input: A number as an integer.

Output: Is it prime or not as a boolean.

Example:

```checkio(5) == True
checkio(18) == False
```

How it is used: Challenge your creativity and come up with a solution to fit this mission's specs!

Precondition: 1 < number < 10000

45
Settings
Code:
Other:
Invalid hot key. Each hot key should be unique and valid
Hot keys:
•  to Run Code: to Check Solution: to Stop:
CheckiO Extensions

CheckiO Extensions allow you to use local files to solve missions. More info in a blog post.

In order to install CheckiO client you'll need installed Python (version at least 3.8)

Install CheckiO Client first:

`pip3 install checkio_client`

`checkio --domain=py config --key=`

Sync solutions into your local folder

`checkio sync`

(in beta testing) Launch local server so your browser can use it and sync solution between local file end extension on the fly. (doesn't work for safari)

`checkio serv -d`

Alternatevly, you can install Chrome extension or FF addon

`checkio install-plugin`
`checkio install-plugin --ff`
`checkio install-plugin --chromium`

Read more here about other functionality that the checkio client provides. Feel free to submit an issue in case of any difficulties.

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