[prime] Forum Topics

Hello everyone, I am posting this more generically in the software development section to see what might be available and to increase a possible success rate. But enough of that let's get to the question at hand. Recently, in C#, I started back up a project of mine to do …

Hi my friends! Here is a wrong code, Wrong and I don't know why. My purpose is to make a **sieve of Erasthotene**. I make an unique function with many inner loops. But the execution **don't go cross the lines** I illustrate this with the help of printing the different …

Hello, guys. This challenge asks us to find the 10001-th prime. Here's my code: // A reasonable approximation is to say that the n-th prime is such that p(n) = n*(log n + log*(log n) - 1). // With that in mind, we can say that the 10001-th prime is …

Hello every one Can I have a better algorithm to find the nth prime number, where 1<= n <=5000000. for e.g., 1st prime number is 2. 10th prime number is 29. 100th prime number is 541. 1000th prime number is 7919. 10000th prime number is 104729. 100000th prime number is …

I have been trying to fix this since two eeks and I have no clue what I am doing wrong. I have gotten the program to work so that it can tell if a number is prime or not, but the problem I am having is showing at the end …

#include<stdio.h> int main() { int pcheck=1,i; int k=1000 for(i=2;i<k;i++) { if((k%i)== 0) { pcheck=0; break; } } if(pcheck) { printf("%d is a prime .\n",k); } else { printf("%d is not a prime.\n",k); } return 0; } this code works to check any number i that write in k but when …

IS IT POSSIBLE TO PASS AN ARRAY INTO A FUNCTION AND THEN CALCULATE THE PRIME NUMBERS OUT OF THE LIST?

def isPrime(num,div=2): if(num==div): return True elif(num % div == 0): return False else: return isPrime(num,div+1)

So my code to test a prime number is as follows: PrimeTest(): test = input ( "What number would you like to test? " ) test = int(test) true = 0 divisor = 0 for divisor in range (2, 10): if ( (isinstance( test/divisor, int )== True) & (test/divisor == …

[code]#include <iostream> using namespace std; long int math; long int check; long int divider = 1; long int inputnum; void dividerp(); void counter(); void inputp(); void dividerp(){ math = inputnum/divider; if (math == 1 or inputnum == 2 or inputnum == 1){ cout<<"You do have a prime number there!"<<endl; system("PAUSE"); …

Dear Friends, I am looking a small thing , I need a simple code to check the input whether it's prime , if not can enter same repeateddly upto get a proper value . Please provide a simple code snippet and help me Thanks, Anes

optput its not proper i am tring to print 1 to n given number prime number plese solved error.....

My questions are how to find the nth prime number? I have figured out how to find a list prime numbers. I'm just stuck as for being able to change my code to only print out the, say, 15th, or 500th prime not every previous prime as well. Any help/feed …

Need to find larger prime number then has been inputed.how to do that: I *cin* 5 the reult it self should be 7...?

**Please help me out** I am trying to do the following: "Create a program that calculates prime numbers from a certain number X to a number Y. Modify the program so as to run two threads at the same time. The first thread will start counting from X to Y …

I wrote a short program to factor numbers, and it works in most cases. The problem I am getting is that when I use a very large number I get "Floating point exception: 8." I am assuming that I am trying to divide by 0 on line 43 or 46, …

I'm trying to write a coding that will be able to determine if a number keyed-in is a Prime Number or not. Here's what I did: public class PrimeNumber { public static void main(String args[]) { int n; Scanner Prime = new Scanner(System.in); System.out.println(" Please enter a number: "); n …

Hi, I had to make a java coding that will determine if a number is a prime number or not. Here's the coding I did: import.java.util.Scanner; public class PrimeNumber { public static void main(String args[]) { int n; Scanner Prime = new Scanner(System.in); System.out.println(" Please enter a number: "); n …

my task is to type 20 integer numbers from 0 to 99 as the input data. few tasks are to check the maximum and minimum, and find the total number of even and odd numbers. (this one i already got the answer). But i have problem for my next task, …

/*Ok I have code that's behaving unexpectedly The following program is supposed to print prime numbers for n1=100,n2=1000,n3=10000 and n4=100000 except that for n1=100, it prints the squares of primes less than 10. I can implement this same program in c++ and wouldn't get such output. I need another pair …

Hello friends As I am a beginner of C# in .NET , I got stuck in this program This program is about displaying prime numbers between the range of o and the number you entered. Its running properly.But the output is not correct. Here is my coding [CODE]using System; using …

Hello ,i have problem with code bellow. every data i enter it show me the weight '0'! Can you tell me how can i solve this problem? you should enter number of nods and edges and weight of each edge. [CODE] #include <stdio.h> #include <conio.h> #include <iostream> #include <Windows.h> using …

Hi everybody, How can i find out if a number is prime or not ? For example : [CODE]#include <iostream> using namespace std; int main () { int number; bool isprime; cin >> number; /*algorithm .............. .............. .............. */ if (isprime == false) { cout << "Not prime"; } else …

hi im told to make a program where the user enters a large number like 13195 and the prgrams gives it the highest prime factor, which i 29. now i have to do this using recursion in basic c, without using loops of any kind, so noo for, while etc. …

I need an algorithm that finds how many prime numbers are in a set interval; the interval maximum range is 1 000 000 so a brute force method of checking every number is kinda inefficient

I have a difficult function to write and I have no idea where to begin. Here is the definition of what I need to write: "A function f(x,y) which returns true if the binary number formed by concatenating the bits of x, 8*y-1 zeroes and a one is prime, false …

Im writing a code that ask for two positive integers entered from the keyboard. The first integer N is odd in range of 3-15 and the second with be an initial value I. N will be the size of the array. Beginning the center of the NxN array with the …

An emirp (prime spelled backwards) is a prime number that results in a different prime when its digits are reversed.[1] This definition excludes the related palindromic primes. Emirps are also called reversible primes. this are the list of emirps [url]http://oeis.org/A006567/list[/url] [CODE] public class EmirpProgram { public static void main(String args[]){ …

Hello, I just downloaded the [url=https://mattmccutchen.net/bigint/]big integer library[/url], and I want to use it in my prime number checking program. I downloaded the zip file and got a bunch of .cc and .hh files. I need to know what to do with the files, where I should put them, and …

Hi all, I wrote code to list primes that are in a given "radius" of an even number. For example, 6 - 1 = 5 and 6 + 1 = 7, 14 - 3 = 11 and 14 + 3 = 17, etc. I used Euler's sieve to obtain the …