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
1803533Factored
FactorDigitsBitsDate
16989280871030.7old
22429268636969659310812270.92020-06-07 16:21:12
ECM
DigitsB1Curves
2550000280 / 280
30250000108 / 640
Estimated T-Level: 25.8
TF below 2^81 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-10-03Oliver Kruse127178FAB358DC541013
Verified (Factored)2017-11-05Chang Chia-Tche127178FAB358DC54189593713
Verified2020-06-07pewEF7F4E33DB0723F0263756753
Verified2020-06-09Luigi MorelliEF7F4E33DB0723F0299846253
History
DateUserTypeResult
2020-06-09Luigi MorelliC-PRP
M1803533/1698928087/2242926863696965931081 : EF7F4E33DB0723F0
PRP: Verified
PRP without proof (not generated)
2020-06-07pewC-PRP
M1803533/1698928087/2242926863696965931081 : EF7F4E33DB0723F0
PRP: Verified
PRP without proof (not generated)
2020-06-07Chang Chia-TcheF-ECM
Factor: 2242926863696965931081 / (ECM curve 3, B1=50000, B2=5000000)
2017-11-05Chang Chia-TcheC-PRP
M1803533/1698928087 : 127178FAB358DC54
PRP: Verified
PRP without proof (not generated)
2017-10-03Oliver KruseC-PRP
M1803533/1698928087 : 127178FAB358DC54
PRP: Verified
PRP without proof (not generated)
2016-03-16alpertronNF-PM1
B1=500000, B2=15000000, E=12