Calculate the prime numbers between two any limits. It uses a deterministic test and uses the Sieve of Eratophenes logic. Displays the result in decimal and binary stars. Small application window allows simultaneous use with Microsoft Word, Outlook, Excel, etc.. Recommended on The Math Forum @ Drexel (University) for Middle School, High School and College, ages 6+. Free one month trial. Only 99¢ per month. Educational discount: 20%.