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• List of Mersenne Prime numbers
• GIMPS progress visualization

• Look up exponent / factor

• Aliquot Sequences

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

• P+1 Factors
• Factors missed by P-1
• Factors missed by TF
• Exponents with gaps in TF
• Exponents with less TF than expected
• Exponents with the most known factors
• P-1 factors found via Brent-Suyama
• Gerbicz probably-PRP
• P-1 bounds on unfactored unverified
• Smoothest P-1 factors
• Biggest P-1 / ECM factors
• Recent factors by user
• Top TF factor finding users
• Top discoverers by factor size
• Recently discovered factors by size
• TJAOI progress
• SRBase factor distribution
• TWOK progress
• P-1 vs PRP at wavefront
• PRP vs TF bitlevel
• LL tests done per day
• CERT tests done per day
• Probably-Prime (PRP) cofactors

• Trial-factoring assignment >1000M (tf1G)
• Operation Billion Digits (OBD)
• Worktodo balancer
• Split large assignment blocks to workers
• Sort Strings by Length
• Worktodo skip known-factor assignments
• P-1 to TF worktodo rewriter
• TF worktodo bit level split
• TF worktodo bit level merge
• TF worktodo filter for previous ECM/TF effort
• Factoring Beyond First Factor
• LL-DC priority assignments
• mfactor/factor5 results to JSON converter
• P-1 effort distribution
• TF distribution for factored exponents
• Exponents that were poorly P-1 factored
• Factor discovery date lookup
• FactorDB composite size distribution history
• FactorDB site status and reports
• YAFU JSON factors to FactorDB converter
• Results to BBcode factor results converter

• Graphs of Known Factors

  0M	<	1010	All tracked exponents
  0M	<	232	GPU TF range
  0M	<	1000M	PrimeNet range
  0M	<	193M	low-PrimeNet, low-res
  0M	<	385M	low-PrimeNet, high-res
  50M	<	146M	PrimeNet wavefront

• Trial-Factoring bit-depth lookup
• Prime Factorization for small numbers
• Calculate decimal digits in Mersenne number
• Convert GIMPS Factoring Effort to PFactor

External Links:

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

Donations:

• Donate to MersenneForum + mersenne.ca
• Donate to mersenne.org / GIMPS

Calculate bit size of factor:

Please do not spider these pages to gather CPU data,
the data is freely available:
CPU specification data in JSON format
(6256 models, ~4MB, updated 2026-09-13)

Please do not spider these pages to gather benchmark
data, it is freely available:
Raw benchmark data (13MB, updated 2026-09-13)

×If you have more accurate or complete data than is shown below, please report it here. Please be sure to include URLs supporting your new data in the comments box.

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