Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:





MnDetails
218549
Composite, with 2 known prime factors. Cofactor is composite.
Trial Factored to 268
TF target 244
Factored
FactorDigitsBitsDate
64253407825.9old
35779736422071341.72008-07-21 09:14:11
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000184 / 1566
Estimated T-Level: 30.6 ⓘ
TF below 2^97 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors		ShiftTypeBase
Verified
No proof (small exponent)
2017-09-22Oliver Kruse9F2F401E68464AC12013
Verified
No proof (small exponent)
2017-10-12kkmrkkblmbrbk9F2F401E68464AC1218918013
Verified
No proof (small exponent)
2020-04-17Oliver Kruse2DC32A683D3D6C6524736353
Verified
No proof (small exponent)
2020-06-17Ahmed Azhad2DC32A683D3D6C65210392353
Verified
Certified Good
2023-08-03USAFSS2DC32A683D3D6C65220603853
History
DateUserTypeResult
2023-08-03curtiscCERT
Proof certified good
2023-08-03USAFSSC-PRPM218549/64253407/3577973642207 : 2DC32A683D3D6C65
Proof Certified Good

Proof Power: 5

2022-03-03Oliver KruseNF-PM1B1=30000000, B2=10070832992220
2021-05-31Oliver KruseNF-PM1B1=30000000, B2=3000000000
2021-05-03Dylan DelgadoNF-PM1B1=6500000, B2=604500000
2020-06-17Ahmed AzhadC-PRPM218549/64253407/3577973642207 : 2DC32A683D3D6C65
2020-04-17Oliver KruseC-PRPM218549/64253407/3577973642207 : 2DC32A683D3D6C65
2020-04-06Daniil TsarkovF-ECMFactor: 64253407
2017-10-12kkmrkkblmbrbkC-PRPM218549/64253407/3577973642207 : 9F2F401E68464AC1
2017-09-22Oliver KruseC-PRPM218549/64253407/3577973642207 : 9F2F401E68464AC1
2017-09-22Oliver KruseC-PRPM218549/64253407/3577973642207 : 9F2F401E68464AC1
2008-07-21J FeitsmaFFactor: 3577973642207