primecount | 🚀 Fast prime counting function implementations | Math library

by kimwalisch C++ Version: v7.8 License: BSD-2-Clause

X-Ray Key Features Code Snippets Community Discussions(4)Vulnerabilities Install Support

kandi X-RAY | primecount Summary

primecount is a C++ library typically used in Utilities, Math, Example Codes applications. primecount has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

primecount is a command-line program and C/C++ library that counts the primes below an integer x ≤ 1031 using highly optimized implementations of the combinatorial prime counting algorithms. primecount includes implementations of all important combinatorial prime counting algorithms known up to this date all of which have been parallelized using OpenMP. primecount contains the first ever open source implementations of the Deleglise-Rivat algorithm and Xavier Gourdon's algorithm (that works). primecount also features a novel load balancer that is shared amongst all implementations and that scales up to hundreds of CPU cores. primecount has already been used to compute several prime counting function world records.

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Support

primecount has a low active ecosystem.

It has 284 star(s) with 38 fork(s). There are 21 watchers for this library.

It had no major release in the last 12 months.

There are 4 open issues and 34 have been closed. On average issues are closed in 29 days. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of primecount is v7.8

Quality

primecount has 0 bugs and 0 code smells.

Security

primecount has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

primecount code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

primecount is licensed under the BSD-2-Clause License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

primecount releases are available to install and integrate.

Installation instructions, examples and code snippets are available.

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primecount Key Features

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primecount Examples and Code Snippets

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Community Discussions

Trending Discussions on primecount

Circular primes under a certain number

I need help please

Why when I use a mutex variable it didn't lock the code correctly? anytime the function return me a different answers

React if/else returns before setState

QUESTION

Circular primes under a certain number

Asked 2022-Mar-11 at 21:21

I wrote some code to find the circular prime numbers of a certain number which works fine on its own-

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ANSWER

Answered 2022-Mar-11 at 21:15

Here's some code to use:

Source https://stackoverflow.com/questions/71443999

QUESTION

I need help please

Asked 2021-Dec-04 at 15:29

This program gives me zero primes in the array after running it. This is a program that takes 2d array [n x m] then calculate how many prime numbers are there in the 2d array.

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ANSWER

Answered 2021-Nov-26 at 18:23

For starters instead of this call

Source https://stackoverflow.com/questions/70127519

QUESTION

Why when I use a mutex variable it didn't lock the code correctly? anytime the function return me a different answers

Asked 2021-May-14 at 18:37

All the includes and the global varaibles:

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ANSWER

Answered 2021-May-14 at 18:36

The rand and srand function use internal state and is therefore not reentrant. This means that each of your threads interfere with each other when they call srand and rand.

You want to instead use rand_r which takes a state parameter. This way each thread can maintain its own rng state.

Source https://stackoverflow.com/questions/67538204

QUESTION

React if/else returns before setState

Asked 2020-Mar-19 at 09:37

I want to go through Function ScoreCalc then return the final "primeCount" and setState primeScore to that number.

this.state.animeMax is still empty '' when ScoreCalc() runs in componentWillMount. When I refresh page, primeScore or primeCount changes value. I am guessing it is becuase sometimes "max" state is mounted sometimes not!?

If anyone has ideas, please let me know.

Thank you!

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ANSWER

Answered 2020-Mar-19 at 09:11

Looks like you have some typos?

In scoreCalc(), you are checking like this:

if(this.state.provider[0].primeAction >= this.actionMax){

i think it needs to be:

if(this.state.provider[0].primeAction >= this.state.actionMax){

The same for the other if's ?

Source https://stackoverflow.com/questions/60753828

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install primecount

The primecount command-line program is available in a few package managers. For doing development with libprimecount you may need to install libprimecount-dev or libprimecount-devel.
You need to have installed a C++ compiler and CMake. Ideally primecount should be compiled using GCC or Clang as these compilers support both OpenMP (multi-threading library) and 128-bit integers.
Detailed build instructions

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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