# Calculator model with mod function?

I'm wondering does anyone know of a scientific calculator with a mod function?

In C# this is shown as follows (just in case there are any other mods that a mathematical non-savant such as myself wouldn't be aware of)

5 % 4 = 1

I've looked through the most common ones on the web but the function is either not in the list or not present.

I have a little bit of a bias towards Casio calculators as that's what I'm familiar with but will accept any suggestions that can be currently purchased.

Derek

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Do you want exponentiation modulo a number as well? As you tag it cryptography? This is a bit harder than just the modulo operation, as $a^b \pmod{n}$ is not computed by finding $a^b$ first, but by a process that has intermediate reductions, to keep numbers small. Of course, python (as a command line calculator) and similar programs (Pari, etc.) will do this on a computer. –  Henno Brandsma Mar 16 '11 at 15:21
If you use Windows 7 I desire the same functionality as the mod function that calculator offers. I'm afraid I don't know enough to comment on your observation :-( –  noonand Mar 16 '11 at 16:24
Why do you want a calculator model? –  Mariano Suárez-Alvarez Mar 16 '11 at 17:40
Doing a Masters and I need it for exams... –  noonand Mar 17 '11 at 22:04

Virtually every graphing calculator made in the recent past has a mod function. Many scientific calculators do as well, though the documentation is often lacking.

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@noonand: Casio classifies the fx-85GT as a "Standard Scientific Calculator" and shows no graphing features in the manual. –  Isaac Mar 18 '11 at 14:55
Apparently the Casio FX 991ES Plus does this I have an email from the Casio distributor in Ireland to this effect. I'm a little bit dubious as the manual makes no reference to a modulo function but I'm also mindful of @Isaac's comment about documentation above. –  noonand Mar 28 '11 at 15:47
@noonand: My concern with the FX 991 ES Plus is that looking at images of it, I can't see where the modulo function would be—I don't see a key labeled for it, nor would it make sense to me for it to be in any of the menus based on the menu names. –  Isaac Mar 28 '11 at 17:50
@noonand: The TI-34 MultiView has a "remainder" function. –  Isaac Mar 28 '11 at 17:58