Scroll through the numbers from 1 to 100,000,000,000. See which numbers are Prime and view the Prime Factors of the Composite numbers. Jump directly to a number to see if your phone number or social security number is Prime.
• Prime Numbers are marked with a red circle
• Prime Factors can be viewed by tapping on a number
• Pinch and Zoom to change the number of columns
Updates for iOS 10
Ratings and ReviewsSee All
Great app! I use it every day!
When I write in my journal, I check every day how many days old I am, and put the prime factors in my journal. This app is perfect for that.
I would rather pay to see no ads
The app works, but the ads are very, very annoying. It’s a combination of outside ads and ads for the developers own apps. I would rather pay for the app than see the ads. If I didn’t have to see the ads, I would rate this app four or five stars. I am deleting this app, I can’t handle the ads.
This app is really good! I love how far up it can go. It can go up to over 100 Billion!
With Family Sharing set up, up to six family members can use this app.