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:










MnStatusDetails
217271Factored
FactorDigitsBitsDate
10984821981371340.0old
327058564308084002055949672684.82020-09-06 21:32:54
ECM
DigitsB1Curves
2550000280 / 280
30250000541 / 640
Estimated T-Level: 29.2
TF below 2^92 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-09-22Oliver Kruse7E481C29399D0D581013
Verified (Factored)2017-10-12kkmrkkblmbrbk7E481C29399D0D58118158513
Verified (Factored)2020-04-17Oliver KruseD1CF0781E2AD8540118663653
Verified2020-09-06M MillerD1CF0781E2AD8540210859353
Verified2023-08-03USAFSSD1CF0781E2AD8540215058753
History
DateUserTypeResult
2023-08-03curtiscCERT
PRP Certification
Proof certified good
2023-08-03USAFSSC-PRP
M217271/1098482198137/32705856430808400205594967 : D1CF0781E2AD8540
PRP proof power = 5
PRP: Verified
Proof certified good
2022-03-01Oliver KruseNF-PM1
B1=30000000, B2=10070832992220
2021-05-28Oliver KruseNF-PM1
B1=30000000, B2=3000000000
2021-05-01Dylan DelgadoNF-PM1
B1=6500000, B2=604500000
2020-09-06Ben DeloCERT
PRP Certification
Proof certified good
2020-09-06M MillerC-PRP
M217271/1098482198137/32705856430808400205594967 : D1CF0781E2AD8540
PRP proof power = 5
PRP: Verified
Proof certified good
2020-09-06MarkSF-ECM
Factor: 32705856430808400205594967 / (ECM curve 7, B1=250000, B2=25000000, Sigma=5080343517154757)
2020-04-17Oliver KruseC-PRP
M217271/1098482198137 : D1CF0781E2AD8540
PRP: Verified (Factored)
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M217271/1098482198137 : 7E481C29399D0D58
PRP: Verified (Factored)
PRP without proof (small exponent)
2017-09-22Oliver KruseC-PRP
M217271/1098482198137 : 7E481C29399D0D58
PRP: Verified (Factored)
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M217271/1098482198137 : 7E481C29399D0D58
PRP without proof (not generated)