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

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MnStatusDetails
1802897Factored
FactorDigitsBitsDate
9728757395042586679423992479.72017-11-14 11:38:42
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)David GrovesFD274C82B20F0C1E0
Verified (Factored)2002-10-19Steve GrahamFD274C82B20F0C1E228806
Verified (Factored)2015-06-27MadPooFD274C82B20F0C1E693224
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-11-15kkmrkkblmbrbkCA00B51A455ED80C1145355453
Verified2017-11-15Oliver KruseCA00B51A455ED80C181985153
History
DateUserTypeResult
2017-11-15Oliver KruseC-PRP
M1802897/972875739504258667942399 : CA00B51A455ED80C
PRP: Verified
PRP without proof (not generated)
2017-11-15kkmrkkblmbrbkC-PRP
M1802897/972875739504258667942399 : CA00B51A455ED80C
PRP: Verified
PRP without proof (not generated)
2017-11-14bamF-ECM
Factor: 972875739504258667942399 / (ECM curve 3, B1=50000, B2=5000000)
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2016-02-23Mark RoseNF
no factor from 2^61 to 2^62
2015-08-31ramgeisNF
no factor from 2^65 to 2^66
2015-06-27MadPooC-LL
FD274C82B20F0C1E
2015-04-30mikrNF-PM1
B1=2780000, B2=91760000, E=12
2015-04-20snme2pm1NF
no factor from 2^64 to 2^65
2015-04-20snme2pm1NF
no factor from 2^63 to 2^64
2014-09-20JossNF-PM1
B1=171202
2014-05-12JossNF-PM1
B1=135601
2011-02-07Carsten KossendeyNF-PM1
B1=100000, B2=1650000, E=6
2010-12-13GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-04-11Architects CubedNF
no factor from 2^60 to 2^61