How to calculate 17^23mod55 in casio scientific calculator fx-991MS?

The NEWYES NY-991MS and CTIFREE fx-991ES PLUS calculators do not have a dedicated "FACT" button like the Casio FX-83GTX. However, you can still find prime numbers on these calculators.
To find prime numbers:
NEWYES NY-991MS:
Press the "MODE" button.
Choose "PRIME" from the list of options.
Enter the desired number and press "=" to check if it's prime.
CTIFREE fx-991ES PLUS:
Press the "MODE" button.
Select "TABLE" or "TABLESET."
Input a starting point and an ending point, then observe the table for prime numbers.
Although the techniques may vary from those used on the Casio FX-83GTX, they prove to be effective for prime number calculations on the designated calculators.

PDF]fx-570MS/991MS Additional Functions - Support - Casio

support.casio.com/pdf/004/fx570MS_991MS_E.pdf

Casiodisplay format (Disp) settings while the calculator is in the BASE ... Be sure to checkthe current calculation mode (SD, REG,. COMP ... Use [ and ] to display the expression 4 + 4. Press A ... want to perform scientific function calculations. COMP .

The Casio fx-991es, fx-570es and - Numericana

www.numericana.com/answer/casio.htm

The Casio fx-991ex succeeds the fx-991es (functionally identical to the ... Both are nonprogrammable nongraphing scientific calculators, with natural ... Side-by-side comparison of the fx-991EX and fx-991ES PLUS. ... Displays QR codes for smartphone use .... Work out a formula for many values of the input variables.

CASIO fx-991MS Calculator Tutorial: Lesson 5- Dealing with ...

This calculator can perform some operations on matrices with dimensions up to 3X3, but it cannot be used to find the rank of a matrix. Sorry.

I am afraid but your question does not make sense to me. These are are two different calculators. What do you mean by change? Is it the same as in fairy tales where a prince is changed into a frog?

how to calculate sin 2 theta from fx-991ms calculator

Here it is.

Use the [a b/c] key to separate the elements of a fraction.
To enter 1/2 : press 1, press [a b/c], then press 2

1/2+ 9/3 : 1[a b/c]2 + 9[a b/c] 3 [=]
By the way, why do you keep 9/3 as a fraction when you can have it as an integer? Not that it makes a difference to the calculator.

Hi,
The battery may be depleted and needs to be replaced.

Hope it helps.

Hello,
If by calculus problem you mean derivatives of functions, integrals, extrema and such things, I am sorry to inform you that neither the Casio FX-300MS, nor the FX-991MS can handle them. The newer Casio calculator FX-991ES is capable of performing numerical differentiations and integrations. There also graphing calculators by Casio FX-9750G, FX-9860G as well as by Texas Instruments (TI 83 PLUS/TI84PLUS) that are reasonably performant in that area.

Hope it helps.

there is one button ab/c beneath CALC... if u want to calculate 7 mod 4 then... u should press 7 then ab/c 4 and equal to
1, 3 ,4 which is 4*1=4 and 7-4=3 remainder...