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
1931273Composite: 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 = 30687270
B2 = 21506670570
ECM
DigitsB1Curves
2550000280 / 280
30250000106 / 640
Estimated T-Level: 25.8
LL
StatusDateUserResidueShift
VerifiedPhilipp Hänggi41124B38D05F7F1E0
Verified1999-03-26John Wyszynski41124B38D05F7F1E902119
Verified2015-06-27MadPoo41124B38D05F7F1E1424940
PRP
StatusDateUserResidueShiftTypeBase
Verified2025-09-02KrieselA8CE7BA37CF2C221013
History
DateUserTypeResult
2025-09-03Carlos PinhoCERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-02KrieselC-PRP
A8CE7BA37CF2C221
PRP proof power = 6
PRP: Verified
Proof certified good
2025-03-31JossNF-PM1
B1=30687270, B2=21506670570
2025-03-31JossNF-PM1
B1=30687270, B2=10813079550
2022-08-26RichD0NF-PM1
B1=36000000, B2=11556025740
2022-08-14masserNF-PP1
Start=2/7, B1=1500000, B2=54000000
2022-08-06Wentao HuangNF-PM1
B1=5280000, B2=17564778000
2019-05-09chuenkitNF
no factor from 2^67 to 2^68
2018-10-08JossNF-PM1
B1=1931273, B2=193127300, E=12
2018-10-05JossNF-PM1
B1=1931273, B2=173814570, E=12
2018-10-02JossNF-PM1
B1=1931273, B2=154501840, E=12
2018-10-01JossNF-PM1
B1=1931273, B2=135189110, E=12
2018-02-19TJAOINF
no factor from 2^66 to 2^67
2016-09-09mikrNF-PM1
B1=4400000, B2=130000000, E=12
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
2015-09-04ramgeisNF
no factor from 2^65 to 2^66
2015-06-27MadPooC-LL
41124B38D05F7F1E
2015-05-18lycornNF
no factor from 2^64 to 2^65
2015-05-18omylistNF
no factor from 2^63 to 2^64
2012-01-24markrNF-PM1
B1=275000, B2=6000000, E=12
2011-08-27GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-02-06S485122NF
no factor from 2^60 to 2^61