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

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Exponent Range:










MnStatusDetails
1803563Factored
FactorDigitsBitsDate
895767172727198696066382796332996.22023-08-10 22:39:30
ECM
DigitsB1Curves
2550000280 / 280
30250000105 / 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)Michiel van LoonA2A90548EC1073AD0
Verified (Factored)1999-03-01Alex DarrasseA2A90548EC1073AD1392043
Verified (Factored)2015-07-01MadPooA2A90548EC1073AD467314
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2023-08-10kurly50166392265D24F3129210453
P-1 factors
DateFactorB1B2
2023-08-10895767172727198696066382796332500000069189473430
History
DateUserTypeResult
2023-08-10curtiscCERT
PRP Certification
Proof certified good
2023-08-10kurlyC-PRP
M1803563/89576717272719869606638279633 : 50166392265D24F3
PRP proof power = 7
PRP: Verified
Proof certified good
2023-08-10kurlyF-PM1
Factor: 89576717272719869606638279633 / (P-1, B1=25000000, B2=69189473430)
2023-05-21JossNF-PM1
B1=1803563, B2=6154299690
2023-02-25JossNF-PM1
B1=1803563, B2=2664166890
2023-01-07JossNF-PM1
B1=1803563, B2=919128210
2022-10-28masserNF-PP1
Start=2/7, B1=800000, B2=25600000
2022-10-27masserNF-PP1
Start=6/5, B1=400000, B2=10800000
2022-10-27masserNF-PP1
Start=103/13, B1=200000, B2=4400000
2021-07-12Dylan DelgadoNF-PM1
B1=3000000, B2=393000000
2019-07-15TJAOINF
no factor from 2^67 to 2^68
2018-09-19JossNF-PM1
B1=1803563, B2=180356300, E=12
2018-05-28TJAOINF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2016-02-23Mark RoseNF
no factor from 2^61 to 2^62
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-08-31ramgeisNF
no factor from 2^65 to 2^66
2015-07-01MadPooC-LL
A2A90548EC1073AD
2015-05-01mikrNF-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=171174
2014-05-12JossNF-PM1
B1=135587
2011-02-10Carsten KossendeyNF-PM1
B1=100000, B2=1650000, E=6
2010-12-13GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-04-12Architects CubedNF
no factor from 2^60 to 2^61