Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

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Exponent Range:










MnStatusDetails
1879Composite, with 4 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
605039619.2old
13697911823.7old
9455880383806071549.7old
60189493198870300181761096286364200936118.9old
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
504400000016550 / 16550
5511000000040830 / 40830
60260000000105362 / 105362
6580000000066857 / 194238
Estimated T-Level: 61.7
TF below 2^200 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver KruseC7F5CBAF173FC0BF4013
Verified2017-10-02kkmrkkblmbrbkC7F5CBAF173FC0BF4013
Verified2017-12-07ATHC7F5CBAF173FC0BF446913
Verified2020-04-17Oliver Kruse6F2C18E6F74531CB4147553
Verified2020-08-12_p95holder_6F2C18E6F74531CB487653
History
DateUserTypeResult
2022-12-03mikrNF-PM1
B1=400000000000, B2=2574610952249956620
2021-07-25ViliamFNF-PP1
Start=2/7, B1=1000000000, B2=221000000000
2020-08-12_p95holder_C-PRP
M1879/605039/13697911/945588038380607/601894931988703001817610962863642009 : 6F2C18E6F74531CB
PRP: Verified
PRP without proof (small exponent)
2020-04-17Oliver KruseC-PRP
M1879/605039/13697911/945588038380607/601894931988703001817610962863642009 : 6F2C18E6F74531CB
PRP: Verified
PRP without proof (small exponent)
2017-12-07ATHC-PRP
M1879/605039/13697911/945588038380607/601894931988703001817610962863642009 : C7F5CBAF173FC0BF
PRP: Verified
PRP without proof (small exponent)
2017-10-02kkmrkkblmbrbkC-PRP
M1879/605039/13697911/945588038380607/601894931988703001817610962863642009 : C7F5CBAF173FC0BF
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M1879/known_factors : C7F5CBAF173FC0BF
PRP without proof (not generated)
2016-09-07kkmrkkblmbrbkNF-PM1
B1=1000000000, B2=100000000000, E=12