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• List of Mersenne Prime numbers
• GIMPS progress visualization

• Look up exponent / factor

• Calculate CPU Credit for any assignment
• CPU Throughput calculator
• Prime95 benchmarks
• Estimated GPU trial-factoring performance
• Estimated GPU Lucas-Lehmer performance
• P-1 probability calculator

• Exponents that were poorly P-1 factored
• Factors missed by P-1
• Exponents with less TF than expected
• Exponents with the most known factors
• P-1 factors found via Brent-Suyama
• Smoothest P-1 factors
• Probable prime (PRP) testing

• Worktodo balancer
• Split large assignment blocks to workers
• Worktodo skip known-factor assignments
• P-1 to TF worktodo rewriter
• TF worktodo bit level splitter

• Graph of known factor bit depths (0-2³²)
• Graph of known factor bit depths (0-999M)
• Graph of known factor bit depths (0-192M)
• Graph of known factor bit depths (0-384M)

• Trial-factoring assignment >1000M
• Trial-Factoring bit-depth lookup
• Prime Factorization for small numbers
• Calculate number of digits in an exponent
• Convert GIMPS Factoring Effort to PFactor

External Links:

• Mersenne Forum
• Mersenne Wiki
• GPU to 72 by Chris Halsall
• Factorization using ECM
• Mersenne software download mirror

Calculate bit size of factor: