How do I find modulus

[mantis]

I need to find the modulus of prime numbers on my calculator. I have checked the calculator's manual and there isnt any modulus function. Is there a procedure I can follow to still find the modulus ?

PLEASE HELP ! :cry:

[mantis]

Come on .. I need urgent help for this. I seen so many geniuses on Neowin :)

[masterren]

What calculator do you have?

I use a TI-86 and there is a

mod(x,y)

function that is the same as

x mod y

[David Scaife]

Correct me if I'm wrong, but isn't the modulus just the remainder of the division? Like 8 mod 7 = 1?

If you can do long division, it should be easy to work out without your calculator.

[mantis]

What calculator do you have?

I use a TI-86 and there is a

mod(x,y)

function that is the same as

x mod y

585807418[/snapback]

I have a Sharp EL-520W. :wacko: I wish I had a TI-86.

Correct me if I'm wrong, but isn't the modulus just the remainder of the division? Like 8 mod 7 = 1?

If you can do long division, it should be easy to work out without your calculator.

585807431[/snapback]

Yes x modulus y is basically the remainder after dividing x by y. I have to calculate modulus on some large numbers like 14459929 mod 53.

[David Scaife]

Yes x modulus y is basically the remainder after dividing x by y. I have to calculate modulus on some large numbers like 14459929 mod 53.

585807455[/snapback]

45. Again, can you do long division? Dividing two constants with long division is extremely easy (not as fast as a calculator, but easy).

Edit: Through doing that long division, I got an idea... divide the two numbers on your calculator, and multiply everything after the decimal by the divisor and that should give you the answer.

In this case, you'd do 14459929 / 53 = 272828.8491, so then multiply 0.8491 by 53 and you get 45.0023 (I guess the 0.0023 is due to rounding on the first division).

2nd Edit: typos & made example clearer

Edited April 21, 2005 by scaife

[mantis]

This is the calculator I have.

http://www.tuleriit.ee/progs/index.php?rsharp=1

[mantis]

Edit: Through doing that long division, I got an idea... divide the two numbers on your calculator, and multiply everything after the decimal by the divisor (i.e. 0.8491 x 53) and that should give you the answer (in this case, 45.0023 but I guess thats due to rounding on the first division).

585807495[/snapback]

I figured the same. It will take longer as opposed to simply enter it in a function but still it does the job.

Thanks a lot for your help. :) You are the only genius at Neowin. ;)

[David Scaife]

I figured the same. It will take longer as opposed to simply enter it in a function but still it does the job.

Thanks a lot for your help. :) You are the only genius at Neowin. ;)

585807534[/snapback]

Glad I could help, though I'm no genius.

[Guest]

Crazy US Maths :p

I thought Modulus was the "length" of a point on an Argand Diagram (Complex numbers)

ie.

3 + 2j would have modulus ROOT(3^2 + 2^2)

= ROOT(13)

[David Scaife]

Modulus, modulo... you're right, modulus is the length between the origin and a point in the context of complex numbers, or the length of a vector, or whatever other applications it has; what we're talking about here is really the modulo. Thanks for clearing that up; it's easy to forget there's a difference when they are both referred to as just 'mod'.

[mikey]

WTF, the modulus is just the number with no sign, e.g the modulus of -8 is 8 and the modulus of 9 is 9

[lav-chan]

In advanced theoretical physics, a modulus is a scalar field with no potential energy. See moduli.

In materials science, modulus (or elastic modulus) is a measure of the stiffness of a material. See also Young's modulus

In mathematics, the modulus of a number (real or complex) is its absolute value. The modulus of a vector is its length.

The word modulus also denotes the number by which two numbers are said to be congruent in modular arithmetic.

The word modulo, which is the Latin ablative of modulus, has many meanings (all somewhat related) in mathematics and computing. See modulo.

Another mathematical sense is the modulus of continuity.

That calculator apparently sucks~ There's nothing on Google about it. :/

[The__Godfather]

Im a little stuck on this one, I am after a calculator that has the 'mod' function (Modulo operation) to work out the remainder. I only need a calculator because that is all i can take into the exam...but the funtion is really needed cause of the massive numbers being worked with. I am just after a calculator model or even a method that can work with these large numbers

eg. 88^7 mod 187

hence the method shown in this post is rather useless to me

:rolleyes: only if i could take my laptop into the exam..windows calc has mod on it :sleep:

Any help would be greatly appreciated :D

ps: The answer to that eg. is 11 :) thanks windows calc lol...