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

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MnStatusDetails
3888683Composite, with 5 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
466641961928.8old
15010316391030.52008-09-07 21:12:55
142597694515371443.72008-09-07 21:12:55
12369165706356058044072270.12018-11-21 03:19:31
51650168744599289369692272.12020-04-29 05:26:13
ECM
DigitsB1Curves
25500002 / 280
Estimated T-Level: 20.0
TF below 2^62 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-11-11kkmrkkblmbrbk977A6A0970D01F9C3259461153
Verified (Factored)2017-12-31alan145977A6A0970D01F9C3280731153
Verified (Factored)2018-11-21rucio977A6A0970D01F9C449332253
Verified2020-04-29M Miller977A6A0970D01F9C5180311053
P-1 factors
DateFactorB1B2
2020-04-2951650168744599289369693888680
History
DateUserTypeResult
2022-07-21JossNF-PM1
B1=3888683, B2=3891751500
2022-07-12JossNF-PM1
B1=3888683, B2=130364850
2022-03-20JossNF-PM1
B1=1000000, B2=1035817860
2022-01-17JossNF
no factor from 2^67 to 2^68
2022-01-17JossNF-PM1
B1=1000000, B2=539477400
2020-07-06JossNF-PM1
B1=388868, B2=19443415, E=12
2020-04-29M MillerC-PRP
M3888683/466641961/1501031639/14259769451537/1236916570635605804407/5165016874459928936969 : 977A6A0970D01F9C
PRP: Verified
PRP without proof (not generated)
2020-04-29JossNF-PM1
B1=388868, B2=3888683, E=6
2020-04-29JossF-PM1
Factor: 5165016874459928936969 / (P-1, B1=388868)
2018-11-21rucioC-PRP
M3888683/466641961/1501031639/14259769451537/1236916570635605804407 : 977A6A0970D01F9C
PRP: Verified
PRP without proof (not generated)
2018-11-21rucioF-ECM
Factor: 1236916570635605804407 / (ECM curve 2, B1=50000, B2=5000000)
2017-12-31alan145C-PRP
M3888683/466641961/1501031639/14259769451537 : 977A6A0970D01F9C
PRP: Verified
PRP without proof (not generated)
2017-11-11kkmrkkblmbrbkC-PRP
M3888683/466641961/1501031639/14259769451537 : 977A6A0970D01F9C
PRP: Verified
PRP without proof (not generated)
2008-09-07Will EdgingtonF
Factor: 14259769451537
2008-09-07Will EdgingtonF
Factor: 1501031639