473,699 Members | 2,701 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

The first prime number over 1,000,000,000,0 00?

22 New Member
Anyone want to venture a guess at the first prime number above 1,000,000,000,0 00? I used my program shown in the C++ section to calculate it... you won't win anything if you get it, but I thought it might be fun. Please excuse my enthusiasm about this, but this is the first program I have written mostly on my own, but with some crucial help from people, that did anything even remotely useful and worked!
Jan 30 '07 #1
4 2333
bartonc
6,596 Recognized Expert Expert
Here is what the python code looks like.
Jan 30 '07 #2
Caffiend
22 New Member
Much more efficient than mine, LOL.... It took me somwhere between 5-10 minutes (i wasn't counting) to calculate that the first prime after 10^15... which is 1,000,000,000,0 00,037
Jan 30 '07 #3
bartonc
6,596 Recognized Expert Expert
Much more efficient than mine, LOL.... It took me somwhere between 5-10 minutes (i wasn't counting) to calculate that the first prime after 10^15... which is 1,000,000,000,0 00,037
So you ran it? I didn't try it. I bet it at a huge chunk of memory at 10^15...
Feb 1 '07 #4
Caffiend
22 New Member
I haven't run the python code, but my C++ did calculate it to that... I've since become slightly obsessed with prime numbers, LOL, joined GIMPS, been reading books on them.
Feb 2 '07 #5

Sign in to post your reply or Sign up for a free account.

Similar topics

36
8390
by: Dag | last post by:
Is there a python module that includes functions for working with prime numbers? I mainly need A function that returns the Nth prime number and that returns how many prime numbers are less than N, but a prime number tester would also be nice. I'm dealing with numbers in the 10^6-10^8 range so it would have to fairly efficient Dag
9
2713
by: Greg Brunet | last post by:
In doing some testing of different but simple algorithms for getting a list of prime numbers, I ended up getting some results that seem a bit contradictory. Given the following test program (testPrimes.py) with two algorithms that both check for primes by testing only odd numbers using factors up to the square root of the value, where Primes1 is based on all of the existing primes so far, and Primes2 is based on all odd numbers, I would...
5
2718
by: Rahul | last post by:
HI. Python , with its support of arbit precision integers, can be great for number theory. So i tried writing a program for testing whether a number is prime or not. But then found my function painfully slow.Here is the function : from math import sqrt def isPrime(x): if x%2==0 or x%3==0: return 0
11
7154
by: don | last post by:
Ok, this is a homework assignment, but can you help me out anyway...... I need a routine for figuring out if a number inputted by the user is a prime number or not...... all I'm asking for is Not the exact code ( well maybe a little) but the logic or algorithm to tell whether or not a number is prime....
20
6814
by: Tuvas | last post by:
I have made and recently posted a libary I made to do Modular Arithmetic and Prime numbers on my website at http://www.geocities.com/brp13/Python/index.html . I am currently in a crypotology class, and am working on building a RSA public key cryptology system for a class project. I am building the librarys just to get the experience to do so. However, I would ask if any of you know of any gaping security holes that can easily be seen from...
2
4232
by: wudoug119 | last post by:
This is my code and it will take any number that I input and say it is a prime number. Please help me... int Prime(int prime) //declares isPrime as a function using integers { int primeCount = 2; //declares primeCount as an int variable and sets it equal to 2 while(primeCount < prime) //checks if primeCount is less than prime {
7
4897
by: newstips6706 | last post by:
1, 2, 3, 5, 7... PRIME Numbers ________________________________ Definitions What is a PRIME Number ?
12
6216
by: electric916 | last post by:
I have a homework assignment i Am totally confused on. I started with a basic code to determine if a number is prime or not, but need guidance from here. I will post assignment details then what I have so far. Problem 1: Is it a prime number? Write a Python program that allows the user to enter a whole number greater than 1 and that determines whether or not this number is a prime number. If it is a prime number, then this information is...
6
6998
by: sigkill9 | last post by:
I'm doing some reading in a python book and am doing one of the chapter exercises but I cant figure out how to get it to work and was hoping some of you python guru's could help out? Heres description of the problem to be solved: "A positive whole number n > 2 is prime if no number between 2 and the square root of n (inclusive) evenly divides n. Write a program that accepts a value of n as input and determines if the value is prime. If n...
0
9173
Oralloy
by: Oralloy | last post by:
Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed. This is as boiled down as I can make it. Here is my compilation command: g++-12 -std=c++20 -Wnarrowing bit_field.cpp Here is the code in...
0
9033
jinu1996
by: jinu1996 | last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth. The Art of Business Website Design Your website is...
1
8911
by: Hystou | last post by:
Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
0
8882
tracyyun
by: tracyyun | last post by:
Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
0
7748
agi2029
by: agi2029 | last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own.... Now, this would greatly impact the work of software developers. The idea...
1
6533
isladogs
by: isladogs | last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM). In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules. He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms. Adolph will...
0
5872
by: conductexam | last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one. At the time of converting from word file to html my equations which are in the word document file was convert into image. Globals.ThisAddIn.Application.ActiveDocument.Select();...
2
2345
muto222
by: muto222 | last post by:
How can i add a mobile payment intergratation into php mysql website.
3
2009
bsmnconsultancy
by: bsmnconsultancy | last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.