Modular Inverse - CypherCalc

You can use CypherCalc to compute the Modular Inverse of a number. The Modular Inverse of a number a is defined as a^-1, such that:

(a)(a^-1) mod n = 1,

where n is the modulus and a^-1 is the Modular Inverse we desire. You provide a and n, and CypherCalc will compute a^-1. The modulus n is assumed to be loaded into CypherCalc's "N" operand memory.

Here's the procedure:

Enter the number to be inverted into the "Number (a)" box. You can either type this number, or paste it from another area, such as another CypherCalc window, or another application.
Click the "Compute" button. CypherCalc will compute the inverse and display the result in the "Modular Inverse (a^-1)" box.