Marin Mersenne 2^P-1
Username
Password
Forgot password?
White
Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
1748941Composite: proven not-prime with both PRP and Lucas-Lehmer tests
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 = 17000000
B2 = 272007836100
ECM
DigitsB1Curves
2550000280 / 280
30250000105 / 640
Estimated T-Level: 25.8
LL
StatusDateUserResidueShift
Verifiedphil kennyAAC34E68FCA14FB80
Verified1998-12-06Brian J. BeesleyAAC34E68FCA14FB8436982
Verified2015-06-27MadPooAAC34E68FCA14FB8821777
PRP
StatusDateUserResidueShiftTypeBase
Verified2025-09-02Kriesel72465D5F544B407F013
History
DateUserTypeResult
2025-09-03mattashiiCERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-02KrieselC-PRP
72465D5F544B407F
PRP proof power = 6
PRP: Verified
Proof certified good
2023-07-18linamentNF-PM1
B1=17000000, B2=272007836100
2023-07-17linamentNF-PM1
B1=17000000
2023-06-22JossNF-PM1
B1=1748941, B2=5978998410
2023-03-04JossNF-PM1
B1=1748941, B2=2438007390
2023-01-04JossNF-PM1
B1=1748941, B2=1002291990
2023-01-04JossNF-PM1
B1=1748941, B2=910244790
2022-08-02masserNF-PP1
Start=113/67, B1=1700000, B2=61200000
2019-06-17TJAOINF
no factor from 2^67 to 2^68
2018-10-18JossNF-PM1
B1=1748941, B2=192383510, E=12
2018-10-11JossNF-PM1
B1=1748941, B2=174894100, E=12
2018-10-03JossNF-PM1
B1=1748941, B2=17489410, E=12
2017-09-01TJAOINF
no factor from 2^66 to 2^67
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
2015-09-05ramgeisNF
no factor from 2^65 to 2^66
2015-06-27MadPooC-LL
AAC34E68FCA14FB8
2015-06-20mikrNF-PM1
B1=3642200, B2=123456789, E=12
2015-05-13snme2pm1NF
no factor from 2^64 to 2^65
2015-05-13snme2pm1NF
no factor from 2^63 to 2^64
2015-04-22Squeeky_SquirrelNF-PM1
B1=130000, B2=3640000, E=6
2014-09-15-Anonymous-NF-PM1
B1=173398
2014-05-06JossNF-PM1
B1=136699
2014-04-08JossNF-PM1
B1=100000
2011-02-10Carsten KossendeyNF-PM1
B1=95000, B2=1543750, E=6
2010-11-18GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-04-22Architects CubedNF
no factor from 2^60 to 2^61