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

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MnStatusDetails
1701101Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
12845384288462534710891692580.12018-07-26 19:53:53
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)Joel ArmengaudCB1D58656386B2E80
Verified (Factored)1999-02-14Ethan O'ConnorCB1D58656386B2E8773334
Verified (Factored)2015-06-27MadPooCB1D58656386B2E8391364
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2018-07-27Gabriel LignelliA93A00F80BD06E89195635453
Verified2018-07-27_p95holder_A93A00F80BD06E8915623553
History
DateUserTypeResult
2018-07-27_p95holder_C-PRP
M1701101/1284538428846253471089169 : A93A00F80BD06E89
PRP: Verified
PRP without proof (not generated)
2018-07-27Gabriel LignelliC-PRP
M1701101/1284538428846253471089169 : A93A00F80BD06E89
PRP: Verified
PRP without proof (not generated)
2018-07-26nordiF-ECM
Factor: 1284538428846253471089169 / (ECM curve 47, B1=50000, B2=5000000)
2018-06-18TJAOINF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^61 to 2^62
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2015-08-30ramgeisNF
no factor from 2^65 to 2^66
2015-06-27MadPooC-LL
CB1D58656386B2E8
2015-02-15VictordeHollanderNF-PM1
B1=10000000, B2=200000000, E=12
2015-02-13VictordeHollanderNF
no factor from 2^64 to 2^65
2015-02-13VictordeHollanderNF
no factor from 2^63 to 2^64
2015-02-02JossNF-PM1
B1=309755
2015-01-07JossNF-PM1
B1=281596
2014-10-01JossNF-PM1
B1=187731
2014-05-03JossNF-PM1
B1=150000
2014-03-31JossNF-PM1
B1=100000
2011-02-07Carsten KossendeyNF-PM1
B1=90000, B2=1507500, E=6
2011-01-27JossNF-PM1
B1=50000
2010-10-04GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-04-21Architects CubedNF
no factor from 2^60 to 2^61