PrimeCalculator factorizes a number or a maths expression into its prime factors and display its number type Unit, Prime (AdditivePrime or NonAdditivePrime), and Composite (AdditiveComposite or NonAdditiveComposite).
For large integers, PrimeCalculator uses internally the excellent Yet Another Factorization Utility from http://sourceforge.net/projects/yafu.
PrimeCalculator shows the prime/composite index, additive index and non-additive index of the factored number and allows the user to enter an index to directly find a prime/composite number by index.
What's more, 4n+1 prime or composite numbers are given as the sum or difference of two squares respectively.
PrimeCalculator also classifies a number as perfect, abundance or deficient and display its perfect, abundance or deficient index and allows the user to enter an index to go directly to a perfect, an abundance or a deficient number by index.
Finally, PrimeCalculator can display the next or previous prime number to the currently displayed number.
PrimeCalculator is part of a much larger open-source project called QuranCode that studies how prime numbers are used to produce Readable Ciphertext (the literal meaning of Quran). See http://qurancode.codeplex.com
Be a guiding light ...