XICalc is a whole number calculator that works in Windows, and is of freeware. These are its main characteristics:
* Multiple precision whole numbers with millions of digits.
* It uses Hartley transformations to accelerate large-sized multiplications.
* Separate notation for entry and exit, from root 2 to root 36.
* Support for functions like maximum common divider, arithmetic mode, Euler numbers, Bernoulli numbers, Boulean functions, random number generator, etc.
* Phi, Sigma and Tau numerical functions.
* Algebraic notations.
* Goto sentences and If-then-else sentences.
Integrated help in F1.
NOTE: For XICalc to work correctly, it needs b> Microsoft .NET Framework installed on your PC.