Prefacto - Prime Numbers is an educational and reference app available for iPhone. Developed by Daniel Springer, this app provides a range of features related to prime numbers. With Prefacto, users can easily check whether a number is prime, generate a list of primes within a given range, decompose a number into its prime factors, and more.

One of the key advantages of Prefacto is its offline functionality. Users can access all the features of the app without an internet connection, making it convenient for on-the-go usage. Additionally, the app is designed to be lightweight and does not consume excessive storage memory on the user's device.

Whether you are a student studying prime numbers or simply have an interest in mathematics, Prefacto - Prime Numbers is a comprehensive tool that provides quick and accurate results. Explore the world of prime numbers with this user-friendly app.