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

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MnStatusDetails
3758539Factored
FactorDigitsBitsDate
25036325346738604380012271.12021-08-17 21:13:47
ECM
DigitsB1Curves
255000016 / 280
Estimated T-Level: 20.3
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Bruce Appleby97258AA5734F174D0
Verified (Factored)1999-09-22Stephen R. Corey97258AA5734F174D1148202
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2021-08-18SRJ2877935A4E0C26B0CAED137423853
History
DateUserTypeResult
2022-05-25JossNF-PM1
B1=100000, B2=130364850
2022-03-22JossNF-PM1
B1=100000
2022-03-03JossNF-PM1
B1=90000
2021-08-18Ben DeloCERT
PRP Certification
Proof certified good
2021-08-18SRJ2877C-PRP
M3758539/2503632534673860438001 : 935A4E0C26B0CAED
PRP proof power = 7
PRP: Verified
Proof certified good
2021-08-17nordiF-ECM
Factor: 2503632534673860438001 / (ECM curve 4, B1=50000, B2=6750000, Sigma=1483798554034457)
2021-03-26axnNF
no factor from 2^69 to 2^70
2020-11-16TJAOINF
no factor from 2^68 to 2^69
2019-02-08YxinityNF
no factor from 2^67 to 2^68
2019-01-28TJAOINF
no factor from 2^67 to 2^68
2016-11-07Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-28ramgeisNF
no factor from 2^65 to 2^66
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-12-31mikrNF-PM1
B1=1600000, B2=66000000, E=12
2015-01-25VictordeHollanderNF
no factor from 2^64 to 2^65
2015-01-25VictordeHollanderNF
no factor from 2^63 to 2^64
2013-03-19Squeeky_SquirrelNF-PM1
B1=110000, B2=2035000, E=6
2012-04-21GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-04-21markrNF
no factor to 2^62
2009-07-11Carsten KossendeyNF-PM1
B1=20000, B2=265000
2009-03-03S485122NF
no factor from 2^60 to 2^61