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
1875833Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 268
TF target 261
TF below 2^81 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 25000000
B2 = 69255158280
ECM
DigitsB1Curves
2550000280 / 280
30250000106 / 640
Estimated T-Level: 25.8
LL
StatusDateUserResidueShift
VerifiedJim GreerEC414BCF4586062B0
Verified1999-01-29Rando WiesemannEC414BCF4586062B1833315
Verified2015-07-01MadPooEC414BCF4586062B1841378
History
DateUserTypeResult
2024-02-03kurlyNF-PM1
B1=25000000, B2=69255158280
2023-12-26NumberwangNF-PM1
B1=187000, B2=1125481500
2023-06-11JossNF-PM1
B1=1875833, B2=8443242990
2023-01-09JossNF-PM1
B1=1875833, B2=1647836190
2022-10-30masserNF-PP1
Start=2/7, B1=800000, B2=25600000
2022-10-29masserNF-PP1
Start=6/5, B1=400000, B2=10800000
2022-10-27masserNF-PP1
Start=169/41, B1=200000, B2=4400000
2019-06-10TJAOINF
no factor from 2^67 to 2^68
2018-09-24JossNF-PM1
B1=1875833, B2=187583300, E=12
2018-02-25JossNF-PM1
B1=1875833, B2=99532800, E=12
2018-02-09JossNF-PM1
B1=1875833, B2=49766400, E=12
2018-02-05TJAOINF
no factor from 2^66 to 2^67
2018-02-04JossNF-PM1
B1=1875833, B2=24883200, E=12
2018-01-07JossNF-PM1
B1=1875833, B2=12441600, E=12
2017-02-19JossNF-PM1
B1=1244160, B2=12441600, E=12
2017-01-14JossNF-PM1
B1=1036800
2017-01-03JossNF-PM1
B1=864000
2016-12-20JossNF-PM1
B1=720000
2016-11-13JossNF-PM1
B1=600000
2016-02-23Mark RoseNF
no factor from 2^61 to 2^62
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-10-07Bruno VictalNF-PM1
B1=500000, B2=15000000, E=12
2015-09-12ramgeisNF
no factor from 2^65 to 2^66
2015-07-01MadPooC-LL
EC414BCF4586062B
2015-05-09snme2pm1NF
no factor from 2^64 to 2^65
2015-05-09snme2pm1NF
no factor from 2^63 to 2^64
2012-01-12markrNF-PM1
B1=275000, B2=6000000, E=12
2011-03-08GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-04-10Architects CubedNF
no factor from 2^60 to 2^61