Prime Number Calculator

Check Prime Numbers:
Enter the Number [ <= 9999999 ]  
 
Is the Given Number a prime number =
Next highest (nearest) prime-number =
Next least / smallest (nearest) prime number =

A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself.

The calculator test the number is or not a prime number. At the same time it give the nearest higher prime number and nearest smaller prime number.

For example, Enter a number 20, it isn't a prime number. the next prime number is 23, the previous is 19.

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