Prime Number Calculator

This prime number calculator (Generator & Checker) has four options to find prime number.

1. Finding Prime Numbers Between 2 Numbers

   If you want to find the prime numbers between 2 given numbers, select the option Primes Between 2 Numbers. This is the default option selected in the drop down box. Enter the range of numbers, from which you need to identify and list down the prime numbers. For example; enter 100 in the Starting Number textbox and 200 in the Ending Number textbox. Once the number range is entered, press Generate / Check Prime button. NOTE: The difference between the ending number and starting number should not be more than 1000. i.e. if the starting number is 258603, then the ending number should be less than or equal to 259603.

2. Check For Prime Number

   If you want to check whether a number is prime or not, select the option Check For Prime Number. After selecting this option, enter the number you want to check for prime in the textbox and press Generate / Check Prime button.

3. Find The Next prime Number

   If you want to find the next prime number for the given natural number, select the option Find Next Prime Number. After selecting this option, enter a number in the text box and press Generate / Check Prime to find the next prime of the entered number.

4. Find The Previous prime Number

   If you want to find the previous prime number for the given natural number, select the option Find Previous Prime Number. After selecting this option, enter a number in the text box and press Generate / Check Prime to find the previous prime of the entered number.

Generating And Printing The Prime Numbers Chart

1. Enter the Starting Number you desire to start the chart.
2. Click the Generate Chart button.
3. Click the Print button to print the chart you have generated.