I have this number x and i wanted to find all numbers which are relatively prime to it.
My code so far:
For i = 1 To x-1
if [number n is relatively prime to x] Then
ListBox1.Items.Add(x)
End If
Next
I want to rite an application that will print first n prime numbers. For example if user enters 7 you should display: 2 3 5 7 11 13 17 Assume that the user will enter only integer values from 1 to 100.
this is what I have so far
Dim intNum As Integer
Dim intX As Integer
Dim strOut As String
[Code]....
[URL]
Each set of ( 1 million ) prime numbers is in a ZIP file just click on say 1st Million
on the left to download a list as a ZIP file.
Here is a similar page which is a lot easier on the eyes:>>
[URL]
These are of course great to use in any security application or as part of any password.
However with the list so readily available on the internet is it such a good idea to use a prime number as part of a password? Food for thought perhaps? ....
I guess it depends on how long it is too. :-)
You could try to remember one that is close to an important date or other number that you know maybe?
If you are more paranoid use more than one prime number in a password with other characters ( UPPER and lower case letters etc ).
[URL]
I am suppose to write a program using if statements and loops: Create an application that reads an integer number from the user and then displays in the List Box all prime numbers (for this project we are going to violate "positive" rule and make our prime numbers be negative as well) between user's number and zero 5 numbers in one row. The application also displays how many prime numbers there are between user's number and zero, and the total sum of all these prime numbers.
View 1 RepliesI'm having a serious brain fart over this but I need a looping statement that will display all prime number from 6 to 10000.
View 3 Repliesi need a prime numbers in console application in vb.net
View 1 RepliesJust out of curosity, what's wrong with the following line. I'm trying to create a range of integers (3,4,5...,50) and then filtering out only those numbers which are not divisible by any integer less than themselves (bruteforce way of finding primes).
Enumerable.Range(3, 50).Where(Function(x) Not Enumerable.Range(2, x - 1).Any(Function(y) x Mod y = 0))
Simple Program for Prime numbers stumped?
View 1 RepliesI made a form with a two text boxes for user input.A (lower bound) and an (upper bound), and then a text box to display all prime numbers in that range.I can't figure out what I am doing wrong, my error checking works properly but my math onlyreturns a true or false.
Function
Prime(ByVal findPrime
As Int32)
[code].....
First off, I'm not sure if this is the right forum, please move it if it isn't. I am only just beginning with visual basic and I am trying to write a basic program to calculate the prime numbers from 1 to 100. This is what I have so far:
[Code]...
So I have been assigned to create a program that finds prime numbers. And then for the final part of the program I need to have the computer find the millionth prime.
View 3 RepliesI am creating an application that takes two numbers (lower and upper) and determines the prime numbers
Public Class primeNumber
Private Sub calculatePrimesButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles calculatePrimesButton.Click
'declare variables
Dim number As Long
[Code] .....
Once I hit the calculate button nothing comes up. I've tried adding the first code inside the function with the remaining code but no result. Now I'm putting the first code in with the calculate prime button. I am guessing there's a sqrt method that needs to be applied but I am not sure if it should be part of the function or the main?
I have two user inputs (as textboxes) for two numbers I'm looking to check for all the prime numbers with the range of those two numbers and display them within a multiline textbox, however my code returns nothing but zeros, and I have seen easier ways to do it without functions but I am curious as to how to go about calculating primes within the function.[code]...
View 7 RepliesI needed to make a program for finding prime numbers. The logic is that you have to put limits n & m and then LOOP and odd-integer P between n & m inclusive. I have a button to click on my form that displays 2 message boxes, one saying " enter upper limit" and the other say "enter lower limit". I need now to get the results of the odd prime numbers between the limits into a list box!
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
[Code].....
I am trying to create a form that allows users to input two numbers a high bound and a low bound then when you click the calculate button it determines all the primes within the range and displays those numbers within a multi-line text box. It seems I have everything working except how to display the prime numbers, the result from the following code displays nothing but zeros so I suspect that the range is not being saved somehow? I have asked this on other sites and people just give me completely different code or their own, can anyone help me with this specific code without changing the underlying code, I have a feeling I might be missing a variable or I am calling the function incorrectly.[code]
View 2 RepliesSo I made a program for generating prime numbers in a list box. My initial code had them listed like this:
2
3
5
7
..ect
Now I have them listed in pairs like this :
[Code]...
Basically what I am making is a form with just one button and 2 text boxes. The purpose of it is that when I click the button 2 random PRIME numbers between 100-999 will show up in the boxes. With my code I have now, the numbers that show up in the boxes aren't always Prime.
My current Code is.......
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Randomize()
Dim p, q, i, j As Integer
[Code] .....
First off, I'm not sure if this is the right forum, please move it if it isn't. I am only just beginning with visual basic and I am trying to write a basic program to calculate the prime numbers from 1 to 100. This is what I have so far:Dim flag As Integer Dim ar(101) As Integer
[Code]...
I've been running through the online "Code Rules" tasks to work through Visual Basic. However I seem to be having a problem with one. The objective is to set a Button Click method to check if any number between 2-5000 is prime or not and to display it in the TextBox if it is prime. Here is what I have so far but it doesn't seem to work.[code...]
View 11 RepliesI've been running through the online "Code Rules" tasks to work through Visual Basic. However I seem to be having a problem with one. The objective is to set a Button Click method to check if any number between 2-5000 is prime or not and to display it in the TextBox if it is prime. Here is what I have so far but it doesn't seem to work
View 3 RepliesI'm working on a console application in VB .net that checks a number that the user has inputted, and tells you whether the number is prime.
The number that has to be inputted has to be between 1 and 100. I have all the code so far and at the moment it can check whether the number is or isn't within the boundries.
What i'm trying to do is compute whether an integer number is prime or not. The program performs this analysis for all odd numbers from 3 up to an input integer limit, for example 100. If the integer in the range 3 to limit is prime, a message stating so is printed. Otherwise, a message is printed that lists at least one other integer divisor. The output for each analyzed number consumes one line of text.
A sample output is shown below:
Limit is 100:
Number 3: is prime
Number 5: is prime
Number 7: is prime
[CODE]...
I understand I need to use loops, boolean functions, vbmath(), strings and multi-line out via concatenation. So I can put this is words how I think it should be done but not so great putting the code together
Test all integers up to the SQRT of the number (100)
limit = math.sqrt(100) + 1
Followed by 1 For statement
For c = 0 to 100 step 2?
And an If statement
If ......
result = false
i need to alter the code to determine if an integer entered by a user is prime preferably to determine if the number entered (between 1 and 50 is even or odd and prime from 51 to 100) i have the code for listing primes from 51-100 (or whatever range needed)but can i condense the code to a smaller foot print rather than have three different sections for each request
[Code]...
I just started to use visual basic last month and I only know the basic codes. No matter how hard I try to understand the codes given by the other member, I can't understand it.So the program I'm making is to show all the inputted values and determine the even numbers, the odd numbers and the prime numbers.I don't know how to get the prime numbers.
Private Sub op1_Click()
a = InputBox("Input Endpoint: ")
For x = 1 To a
[code]....
I've been trying to create a function that checks if a number is a prime. according to [URL]..I have created a function although It doesn't work as expected.
[Code]...
It sometimes returns true for composite numbers. oh and I know if you google it you get functions that do this, but most of them look inefficient so i'm trying to make my own.
i wrote some code that is suppose to get the prime number from the user and give its factors but there's some error
Dim t As Double
Dim n As Double
Dim ans As Double
Dim exp1 As Double
[code].....
So far I have made a program that can find all the factors of a number (e.g type in 24 and you'll get 1 * 24, 2*12, 3*8, 4*6,). What I would like to do now is add a check box (called Show_Prime_Factors_chk) that when checked it will also show all the prime factors below all the normal factors.
View 2 RepliesI have this piece of code which checks whether a given number is prime:
If x Mod 2 = 0 Then
Return False
End If
[code].....
I am not getting an output with a list, I can only get the last number of the statement in a text box.
Dim lowerLimit, upperLimit, primeNumber As Integer
Dim isPrime As Boolean = False
lowerLimit = CType(TextBox1.Text, Integer)
upperLimit = CType(TextBox2.Text, Integer)
While lowerLimit < upperLimit
[Code] .....
How do you make a prime number generator in a windows forms application
View 2 Replies