Prime95

Prime95 is a popular freeware application that is primarily used for stress testing and benchmarking computer hardware, particularly CPUs and RAM. Developed by George Woltman, the program utilizes the Lucas-Lehmer primality test to search for Mersenne prime numbers, which are prime numbers that can be expressed in the form of 2^p - 1, where p is also a prime number.

Aspect	Description
Full Name	Prime95 (also known as GIMPS - Great Internet Mersenne Prime Search)
Developer	George Woltman
Initial Release	1996
Latest Version	30.8 build 9 (as of 2023)
Purpose	• Finding Mersenne prime numbers • CPU stress testing and stability testing • Benchmarking
Main Features	• Prime number search • Torture test • CPU/FPU stress testing • Network distributed computing • Multiple CPU core support
Supported Operating Systems	• Windows • Linux • macOS • FreeBSD
Test Types	• Small FFTs (maximum heat/CPU stress) • Large FFTs (maximum RAM usage) • Blend (combined CPU and RAM test) • Custom (user-defined parameters)
Hardware Requirements	• Minimum: 1 CPU core, 512MB RAM • Recommended: Multi-core CPU, 4GB+ RAM
CPU Instructions Used	• SSE • SSE2 • AVX • AVX2 • FMA3 • AVX-512
Monitoring Capabilities	• CPU temperature • Error detection • Work progress • System stability
Common Uses	• Overclocking validation • System stability testing • Scientific research • Mathematical calculations
Data Output	• Prime number discoveries • Test results • Error logs • Performance statistics
Network Features	• Distributed computing • Result submission • Team participation • Progress tracking
Safety Features	• Automatic result verification • Error checking • Checkpoint saving • Temperature monitoring
Known Limitations	• High power consumption • Extreme CPU stress • High memory usage • May cause system instability
Awards & Recognition	• Discovery of numerous Mersenne primes • Standard tool for CPU testing • Widely used in overclocking community
Configuration Options	• Thread count • Memory usage • Test duration • Priority settings • Custom FFT sizes
Community Support	• Active forum community • Regular updates • Bug reporting system • User guides and documentation
Notable Achievements	• Found largest known prime numbers • Contributed to mathematical research • Industry standard for CPU testing
Integration	• Compatible with monitoring software • Can be automated • Supports command-line operation
Resource Impact	• High CPU utilization • Significant memory usage • Power consumption increase • Temperature increase
Best Practices	• Run with adequate cooling • Monitor temperatures • Start with short tests • Regular breaks between tests
Additional Tools	• Results viewer • Progress tracker • Error analyzer • Performance graphs