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

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MnStatusDetails
1076843Composite, with 3 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
66441213111032.6old
10175989730970786071959.82015-12-16 12:37:51
392910909450359894982430589832995.02020-08-07 11:04:22
ECM
DigitsB1Curves
2550000280 / 280
30250000100 / 640
Estimated T-Level: 25.8
TF below 2^81 is very unlikely to find new factors due to ECM effort.
PRP
StatusDateUserResidueShiftTypeBase
Verified (Factored)2025-09-01Kriesel9166AA19A1ABCB6F013
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-09-28Oliver KruseBFB326418D8C1C972013
Verified (Factored)2017-10-16Oliver KruseBFB326418D8C1C97270382713
Verified (Factored)2018-01-01ATHBFB326418D8C1C97287295913
Verified2020-08-07M Miller9166AA19A1ABCB6F399710653
Verified2020-08-08kutens9166AA19A1ABCB6F324283953
History
DateUserTypeResult
2025-09-01JuanTutorsCERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-01KrieselC-PRP
9166AA19A1ABCB6F
PRP proof power = 6
PRP: Verified (Factored)
Proof certified good
2024-08-21cramsey87NF-PM1
B1=7000000, B2=58926602280
2020-08-08kutensC-PRP
M1076843/6644121311/1017598973097078607/39291090945035989498243058983 : 9166AA19A1ABCB6F
PRP: Verified
PRP without proof (not generated)
2020-08-07M MillerC-PRP
M1076843/6644121311/1017598973097078607/39291090945035989498243058983 : 9166AA19A1ABCB6F
PRP: Verified
PRP without proof (not generated)
2020-08-07TJAOIF-ECM
Factor: 39291090945035989498243058983 / (ECM curve 41, B1=250000, B2=25000000)
2018-01-01ATHC-PRP
M1076843/6644121311/1017598973097078607 : BFB326418D8C1C97
PRP: Verified
PRP without proof (not generated)
2017-10-16Oliver KruseC-PRP
M1076843/6644121311/1017598973097078607 : BFB326418D8C1C97
PRP: Verified
PRP without proof (not generated)
2017-09-28Oliver KruseC-PRP
M1076843/6644121311/1017598973097078607 : BFB326418D8C1C97
PRP: Verified
PRP without proof (not generated)
2015-12-16TJAOIF
Factor: 1017598973097078607 / TF: 59-60