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Look up single exponent:
Look up factor:
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by range
Look up many exponents:
List of Mersenne Prime numbers
GIMPS progress visualization
Look up exponent / factor
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
YAFU JSON factors to FactorDB converter
Results to BBcode factor results converter
Graphs of Known Factors
0M
<
10
10
All tracked exponents
0M
<
2
32
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:
Benchmarks
»
Intel
»
Core2 Duo
Please do not spider these pages to gather CPU data,
the data is freely available:
CPU specification data in JSON format
(6170 models, ~4MB, updated
2026-03-29
)
Please do not spider these pages to gather benchmark
data, it is freely available:
Raw benchmark data (
13MB
, updated
2026-04-19
)
×
Intel Core2 Duo E4300
Intel Core2 Duo E4400
Intel Core2 Duo E4500
Intel Core2 Duo E4600
Intel Core2 Duo E4700
Intel Core2 Duo E6300
Intel Core2 Duo E6305
Intel Core2 Duo E6320
Intel Core2 Duo E6400
Intel Core2 Duo E6405
Intel Core2 Duo E6420
Intel Core2 Duo E6540
Intel Core2 Duo E6550
Intel Core2 Duo E6600
Intel Core2 Duo E6700
Intel Core2 Duo E6750
Intel Core2 Duo E6850
Intel Core2 Duo E7200
Intel Core2 Duo E7300
Intel Core2 Duo E7400
Intel Core2 Duo E7500
Intel Core2 Duo E7600
Intel Core2 Duo E8135
Intel Core2 Duo E8190
Intel Core2 Duo E8200
Intel Core2 Duo E8235
Intel Core2 Duo E8290
Intel Core2 Duo E8300
Intel Core2 Duo E8335
Intel Core2 Duo E8400
Intel Core2 Duo E8435
Intel Core2 Duo E8500
Intel Core2 Duo E8600
Intel Core2 Duo E8700
Intel Core2 Duo L7200
Intel Core2 Duo L7300
Intel Core2 Duo L7400
Intel Core2 Duo L7500
Intel Core2 Duo L7700
Intel Core2 Duo L7800
Intel Core2 Duo P7350
Intel Core2 Duo P7370
Intel Core2 Duo P7450
Intel Core2 Duo P7550
Intel Core2 Duo P7570
Intel Core2 Duo P8400
Intel Core2 Duo P8600
Intel Core2 Duo P8700
Intel Core2 Duo P8800
Intel Core2 Duo P9500
Intel Core2 Duo P9600
Intel Core2 Duo P9700
Intel Core2 Duo SL7100
Intel Core2 Duo SL9300
Intel Core2 Duo SL9380
Intel Core2 Duo SL9400
Intel Core2 Duo SL9600
Intel Core2 Duo SP7500
Intel Core2 Duo SP7700
Intel Core2 Duo SP9300
Intel Core2 Duo SP9400
Intel Core2 Duo SP9600
Intel Core2 Duo SU7300
Intel Core2 Duo SU9300
Intel Core2 Duo SU9400
Intel Core2 Duo SU9600
Intel Core2 Duo T5200
Intel Core2 Duo T5250
Intel Core2 Duo T5270
Intel Core2 Duo T5300
Intel Core2 Duo T5450
Intel Core2 Duo T5470
Intel Core2 Duo T5500
Intel Core2 Duo T5550
Intel Core2 Duo T5600
Intel Core2 Duo T5670
Intel Core2 Duo T5750
Intel Core2 Duo T5800
Intel Core2 Duo T5850
Intel Core2 Duo T5870
Intel Core2 Duo T5900
Intel Core2 Duo T6400
Intel Core2 Duo T6500
Intel Core2 Duo T6570
Intel Core2 Duo T6600
Intel Core2 Duo T6670
Intel Core2 Duo T6900
Intel Core2 Duo T6970
Intel Core2 Duo T7100
Intel Core2 Duo T7200
Intel Core2 Duo T7250
Intel Core2 Duo T7300
Intel Core2 Duo T7400
Intel Core2 Duo T7500
Intel Core2 Duo T7600
Intel Core2 Duo T7600G
Intel Core2 Duo T7700
Intel Core2 Duo T7800
Intel Core2 Duo T8100
Intel Core2 Duo T8300
Intel Core2 Duo T9300
Intel Core2 Duo T9400
Intel Core2 Duo T9500
Intel Core2 Duo T9550
Intel Core2 Duo T9600
Intel Core2 Duo T9800
Intel Core2 Duo T9900
Intel Core2 Duo U7500
Intel Core2 Duo U7600
Intel Core2 Duo U7700
Intel Core2 Duo X9000