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

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MnStatusDetails
1903277Factored
FactorDigitsBitsDate
38450035001454571451976732581.72020-07-02 08:37:52
ECM
DigitsB1Curves
2550000280 / 280
30250000107 / 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)Thomas Honold0C9420377655BBDA0
Verified (Factored)1998-12-13Ludovic Andrivon0C9420377655BBDA1449415
Verified (Factored)2015-06-29MadPoo0C9420377655BBDA708284
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2020-07-02M MillerF3E6063BB6C37858160423853
Verified2020-07-03marssystemsF3E6063BB6C378581172140453
History
DateUserTypeResult
2020-07-03marssystemsC-PRP
M1903277/3845003500145457145197673 : F3E6063BB6C37858
PRP: Verified
PRP without proof (not generated)
2020-07-02M MillerC-PRP
M1903277/3845003500145457145197673 : F3E6063BB6C37858
PRP: Verified
PRP without proof (not generated)
2020-07-02GANF-ECM
Factor: 3845003500145457145197673 / (ECM curve 2, B1=50000, B2=5000000, Sigma=7968055630796130)
2019-04-25chuenkitNF
no factor from 2^67 to 2^68
2017-11-24mikrNF-PM1
B1=8000000, B2=320000000, E=12
2017-03-15Smok_bmv NF
no factor from 2^66 to 2^67
2015-08-31ramgeisNF
no factor from 2^65 to 2^66
2015-06-29MadPooC-LL
0C9420377655BBDA
2015-05-16monstNF
no factor from 2^64 to 2^65
2015-05-16omylistNF
no factor from 2^63 to 2^64
2011-06-30kurlyNF-PM1
B1=1000000, B2=30000000, E=12
2011-02-07Carsten KossendeyNF-PM1
B1=105000, B2=1785000, E=6
2011-01-24GrunwalderGIMPNF
no factor from 2^62 to 2^63
2011-01-24GrunwalderGIMPNF
no factor from 2^61 to 2^62
2009-05-24Architects CubedNF
no factor from 2^60 to 2^61