New Design Not working For You?

If the new page layout is not working for you, please Contact Me and let me know what device, operating system, and web browser (with version numbers) you are using so I can attempt to get the layout working for your setup.

About the Redesign

If you visited this site prior to September 15th, 2018, you've no doubt noticed that I've since launched a complete redesign of the website.

If you're not happy with the new design, I sincerely apologize. I would have preferred to keep the old desktop design, but considering the majority of my site's users are now accessing the site from small-screen, touch-enabled, mobile devices, and considering Google is now penalizing websites for not being mobile/thumb friendly, I was left with no choice but to switch to a responsive, mobile-first design.

The good news is that now that I have combined the three separate versions of the site (mobile, desktop, and ad-free member) into a single design, this will free up a ton of my time for working to make the mobile-optimized calculators more desktop/laptop friendly. In fact, some of the redesigned calculators already offer a desktop-optimized form that becomes visible when you increase the width setting of the calculator (within the "Calculator Preferences" expandable panel).

Thank you in advance for your help and patience as I work to improve the redesign.


Calculator Preferences
Prime Number List Generator Sign

Prime Number List Generator

This calculator will create a custom prime numbers list of up to 10,000 primes, with primes ranging from 2 to 104,730. For example, you could either create a delimited list containing the first 100 prime numbers, or a list of the primes that occur between 100 and 500. Plus, you can also tell the generator to format the list into a custom prime numbers chart for printing.

Learn More

Selected Data Record:

A Data Record is a set of calculator entries that are stored in your web browser's Local Storage. If a Data Record is currently selected in the "Data" tab, this line will list the name you gave to that data record. If no data record is selected, or you have no entries stored for this calculator, the line will display "None".

DataData recordData recordSelected data record: None

Prime number list options:

Tap one of the two options to indicate how you would like to select the set of prime numbers. The next line will change to match your selection.

The left-hand option will generate a list from the number 2 through the number of primes you enter in the field.

The right-hand option will create a set of primes between the two numbers you enter.

Note that the maximum first number of primes is 10000 and the maximum ending between entry is 104730.

First # primes:First # primes:First number of primes:First number of primes:

First number of primes:

Enter the first number of primes you wish to include in your list. The calculator will start with the 2 and continue adding prime numbers until the count reaches your enter number of primes. The maximum entry is 10000.

Between:Between:Primes between 2 numbers:Primes between two numbers:

Range of primes:

Enter the starting and ending number for the range you would like the list of prime numbers to fall between. The calculator will find all primes between the starting and ending numbers entered. The maximum entry in the right-hand field is 104730.

Separate by:Separate by:List item separator:List item separator:

List item separator:

Select how you would like the list delimited (separator to use between numbers).

Prime number list:

Prime number list:

This is the list of prime numbers based on your preferences. This format of the list allows you to highlight and copy the list to paste/import into your preferred document type (word processing, spreadsheet, etc.). To print a chart of the list, see the buttons below the delimited list.

Orientation:Chart orientation:Chart orientation:Chart orientation:

Chart orientation:

If you would like to create a printer friendly chart, choose either Horizontal (numbers listed in order from left-to-right) or Vertical (numbers listed in order from top-to-bottom).

Columns:Chart columns:Number of chart columns:Number of chart columns:

Number of chart columns:

Select the number of columns wide you would like the chart displayed.

If you would like to save the current entries to the secure database, tap or click on the Data tab, select "New Data Record", give the data record a name, then tap or click the Save button. To save changes to previously saved entries, simply tap the Save button. Please select and "Clear" any data records you no longer need.

Feedback AppreciatedFeedback Greatly AppreciatedYour Feedback Would Be Greatly AppreciatedYour Feedback Is Greatly Appreciated


Help and Tools

Help and Tools:

This section, which you can Unstick or Hide in the Calculator Preferences (just above the top of the calculator), contains the following tabs (content too long to fit within bordered frame can be scrolled up and down):

About: Click this tab for an introduction to the calculator.

Instructions: Click this tab for step-by-step instructions for using the calculator.

Terms: Click this tab for a list of the descriptions that are located within each popup help button (info icons).

PCalc: Click this tab for a handy "pocket" calculator you can use when you need to calculate an entry needed for the calculator.

Data: Click this tab to save a set of entries or a note in between visits. Entries and notes will be stored to your web browser's local storage (if supported by your browser of choice), meaning they can only be recalled with the same device and web browser you were using when you saved them. If you'd like to save entries and notes between devices you can do so by subscribing to the Ad-Free Member Version.



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