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

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MnStatusDetails
1600061Factored
FactorDigitsBitsDate
357335296418302791822115586049731101.52014-05-21 22:41:07
ECM
DigitsB1Curves
2550000280 / 280
30250000106 / 640
Estimated T-Level: 25.8 ⓘ
TF below 2^81 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Ethan HansenC31FD444A0F485E30
Verified (Factored)1998-11-07Paul Victor NovareseC31FD444A0F485E3115505
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-10-02Oliver KruseE369A99B4E7F28F61013
Verified2017-10-31kkmrkkblmbrbkE369A99B4E7F28F6150673713
P-1 factors
DateFactorB1B2
2014-05-21357335296418302791822115586049724787230892340280
History
DateUserTypeResult
2017-10-31kkmrkkblmbrbkC-PRP
M1600061/3573352964183027918221155860497 : E369A99B4E7F28F6
PRP: Verified
PRP without proof (not generated)
2017-10-02Oliver KruseC-PRP
M1600061/3573352964183027918221155860497 : E369A99B4E7F28F6
PRP: Verified
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=500000, B2=15000000, E=12
2014-05-21mikrF-PM1
Factor: 3573352964183027918221155860497
2014-01-18Never Odd Or EvenNF
no factor from 2^69 to 2^70
2014-01-18Never Odd Or EvenNF
no factor from 2^68 to 2^69
2014-01-18Never Odd Or EvenNF
no factor from 2^67 to 2^68
2014-01-18Never Odd Or EvenNF
no factor from 2^66 to 2^67
2012-03-13Never Odd Or EvenNF
no factor from 2^65 to 2^66
2011-11-09Never Odd Or EvenNF
no factor from 2^64 to 2^65
2011-11-09Never Odd Or EvenNF
no factor from 2^63 to 2^64
2011-10-31BigBrotherNF-PM1
B1=2000000, B2=40000000, E=12
2010-06-23GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-05-01Architects CubedNF
no factor from 2^60 to 2^61