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
1939169Composite: proven not-prime with both PRP and Lucas-Lehmer tests
TF
No factors below 268
TF target 262
TF below 2^81 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 52000000
B2 = 266417661510
ECM
DigitsB1Curves
2550000280 / 280
30250000106 / 640
Estimated T-Level: 25.8
LL
StatusDateUserResidueShift
VerifiedRobert KulagowskiA4C63FE587E6525A0
Verified1999-03-26Chi-leung ChanA4C63FE587E6525A1350667
Verified2015-07-04MadPooA4C63FE587E6525A456361
PRP
StatusDateUserResidueShiftTypeBase
Verified2025-09-02Kriesel7C0EDF5C0AA231E4013
History
DateUserTypeResult
2025-09-03Manfred_Bruder_01-05-1988_DECERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-02KrieselC-PRP
7C0EDF5C0AA231E4
PRP proof power = 6
PRP: Verified
Proof certified good
2023-07-01RichD0NF-PM1
B1=52000000, B2=266417661510
2023-06-18JossNF-PM1
B1=1940169, B2=8022369810
2023-01-11JossNF-PM1
B1=1940169, B2=1680841890
2022-08-15masserNF-PP1
Start=2/7, B1=1500000, B2=54000000
2019-05-10chuenkitNF
no factor from 2^67 to 2^68
2018-02-08mikrNF-PM1
B1=8000000, B2=320000000, E=12
2018-02-04JossNF-PM1
B1=1939169, B2=28312160, E=12
2017-12-11TJAOINF
no factor from 2^66 to 2^67
2017-04-07JossNF-PM1
B1=1415608, B2=14156080, E=12
2017-01-22JossNF-PM1
B1=1179674
2017-01-04JossNF-PM1
B1=983062
2016-12-24JossNF-PM1
B1=819219
2016-12-17JossNF-PM1
B1=682683
2016-12-15JossNF-PM1
B1=568903
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2016-02-23Mark RoseNF
no factor from 2^61 to 2^62
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2015-10-08Bruno VictalNF-PM1
B1=500000, B2=15000000, E=12
2015-09-05ramgeisNF
no factor from 2^65 to 2^66
2015-07-04MadPooC-LL
A4C63FE587E6525A
2015-05-07lycornNF
no factor from 2^64 to 2^65
2015-05-07lycornNF
no factor from 2^63 to 2^64
2012-01-27markrNF-PM1
B1=275000, B2=6000000, E=12
2011-08-27GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-01-30S485122NF
no factor from 2^60 to 2^61