Prime95 30.19.20

Mersenne Research, Inc. ❘ 8.4MB ❘ Freeware ❘
Windows Mac

Prime95: A Performance Benchmarking Powerhouse

Elena Angelini

01/25/2025

Prime95 is an indispensable tool for overclockers and software developers, offering a reliable benchmark and stress test for CPU stability and performance.

Prime95 is a widely-used software application developed by Mersenne Research, Inc. It is primarily known for its capability to stress test a computer hardware configuration, especially the CPU, by running intensive calculations.

One of the main features of Prime95 is its ability to test the stability of a CPU by running complex mathematical algorithms. This stress testing functionality helps users to identify any potential issues with their hardware configuration, such as overheating, voltage irregularities, or unstable overclocks.

In addition to its stress testing capabilities, Prime95 is also known for its use in prime number research. It uses the computational power of users' computers to find new prime numbers as part of the Great Internet Mersenne Prime Search (GIMPS) project.

Prime95 is available for Windows operating systems and is free to download and use. It offers different testing modes for users to choose from based on their specific requirements, including options for Torture Test, Custom Test, and Stress Test.

Prime95 is a versatile tool that serves both as a stress testing utility for computer hardware and as a contributor to prime number research projects through its distributed computing capabilities.

Overview

Prime95 is a Freeware software in the category Education developed by Mersenne Research, Inc..

The latest version of Prime95 is 30.19.20, released on 06/03/2024. It was initially added to our database on 10/29/2007.

Prime95 runs on the following operating systems: Windows. The download file has a size of 8.4MB.

Users of Prime95 gave it a rating of 5 out of 5 stars.

Pros

Extensive stress testing capabilities for CPU and system stability.
Highly optimized for testing prime numbers and Mersenne primes.
Free to use with regular updates and support.
Supports various types of stress testing options such as Torture Test, Custom Test, and Blend Test.
Ability to run multiple instances for parallel testing on multi-core CPUs.

Cons

Can be complex for beginners due to advanced settings and options.
Intensive CPU usage can lead to overheating on poorly cooled systems.
May not be necessary for average users who don't require intense stress testing.

FAQ

What is Prime95?

Prime95 is a software that searches for Mersenne prime numbers, which are prime numbers that can be represented in the formula 2^n-1.

What are Mersenne prime numbers?

Mersenne prime numbers are prime numbers that can be represented in the formula 2^n-1, where n is a positive integer.

Who developed Prime95?

Prime95 was developed by George Woltman of Mersenne Research, Inc.

Can I use Prime95 on any computer?

Yes, Prime95 runs on Windows, Linux, and Mac OS X.

Does Prime95 only search for Mersenne primes?

No, Prime95 can also be used for stress testing a computer's CPU and testing a computer's memory.

How many Mersenne primes have been discovered?

As of September 2021, there are 51 known Mersenne primes.

How does Prime95 search for Mersenne primes?

Prime95 uses a technique called Lucas-Lehmer primality test to determine if a number is prime or not.

Is there a reward for discovering a new Mersenne prime?

Yes, the Electronic Frontier Foundation offers a monetary award to anyone who discovers a new Mersenne prime.

Can I use Prime95 to overclock my CPU?

Yes, Prime95 can be used to stress test an overclocked CPU to ensure its stability.

Is Prime95 free to use?

Yes, Prime95 is free to download and use.

Elena Angelini

I'm Elena, your go-to software reviewer at UpdateStar and tech enthusiast. Whether you're a user seeking the latest software titles or software news I've got you covered. When I'm not diving into the latest software, you can find me exploring nature trails, camping under the stars, or competing in online multiplayer games. My reviews are designed to be fun, engaging, and packed with all the details you need to make informed decisions.

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Latest Version
30.19.20

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