Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
2141Composite, with 4 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
389663618.6old
6327855458711239.2old
11103050909031340.0old
1115840483000793807126487038208061581659487514347153.02010-09-26 01:15:03
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
504400000016550 / 16550
5511000000040830 / 40830
6026000000061649 / 105362
Estimated T-Level: 57.9
TF below 2^187 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver KruseA914EC608379904C4013
Verified2017-10-02kkmrkkblmbrbkA914EC608379904C4013
Verified2017-12-07ATHA914EC608379904C4139413
Verified2020-04-17Oliver Kruse4878012802AC8BFF484053
Verified2024-01-27Wentao Huang4878012802AC8BFF471953
History
DateUserTypeResult
2024-04-26masserNF-PM1
B1=100000000000, B2=281973233185794150
2024-01-27Wentao HuangC-PRP
M2141/389663/632785545871/1110305090903/11158404830007938071264870382080615816594875143 : 4878012802AC8BFF
PRP: Verified
PRP without proof (small exponent)
2020-04-17Oliver KruseC-PRP
M2141/389663/632785545871/1110305090903/11158404830007938071264870382080615816594875143 : 4878012802AC8BFF
PRP: Verified
PRP without proof (small exponent)
2017-12-07ATHC-PRP
M2141/389663/632785545871/1110305090903/11158404830007938071264870382080615816594875143 : A914EC608379904C
PRP: Verified
PRP without proof (small exponent)
2017-10-02kkmrkkblmbrbkC-PRP
M2141/389663/632785545871/1110305090903/11158404830007938071264870382080615816594875143 : A914EC608379904C
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M2141/known_factors : A914EC608379904C
PRP without proof (not generated)
2016-09-08kkmrkkblmbrbkNF-PM1
B1=500000000, B2=50000000000, E=12
2010-09-26Matthias WurtingerF-ECM
Factor: 11158404830007938071264870382080615816594875143