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

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MnStatusDetails
1598011Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
28764199824.8old
27117804907857561674212012581.22022-06-16 11:19:28
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.
PRP
StatusDateUserResidueShiftTypeBase
Verified (Factored)2025-09-02Kriesel489BF899AA003E7D013
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified (Factored)2017-10-02Oliver KruseD2420C9CD623C6CB1013
Verified (Factored)2017-11-01kkmrkkblmbrbkD2420C9CD623C6CB179779113
Verified2022-06-20some-students489BF899AA003E7D259940453
History
DateUserTypeResult
2025-09-03Carlos PinhoCERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-02KrieselC-PRP
489BF899AA003E7D
PRP proof power = 6
PRP: Verified (Factored)
Proof certified good
2022-06-20TheDogPrescottCERT
PRP Certification
Proof certified good
2022-06-20some-studentsC-PRP
M1598011/28764199/2711780490785756167421201 : 489BF899AA003E7D
PRP proof power = 6
PRP: Verified
Proof certified good
2022-06-16TJAOIF-ECM
Factor: 2711780490785756167421201 / (ECM curve 4, B1=250000, B2=40000000)
2017-11-01kkmrkkblmbrbkC-PRP
M1598011/28764199 : D2420C9CD623C6CB
PRP: Verified (Factored)
PRP without proof (not generated)
2017-10-02Oliver KruseC-PRP
M1598011/28764199 : D2420C9CD623C6CB
PRP: Verified (Factored)
PRP without proof (not generated)
2016-03-16alpertronNF-PM1
B1=500000, B2=15000000, E=12