Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
1848221Factored
FactorDigitsBitsDate
271673072836871444.6old
32442851600298412758972271.52020-12-19 16:08:46
ECM
DigitsB1Curves
2550000280 / 280
30250000106 / 640
Estimated T-Level: 25.8
TF below 2^81 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-10-04Oliver Kruse190C4AF64A6608661013
Verified (Factored)2017-11-06ATH190C4AF64A6608661180934113
Verified2020-12-19mrhB7F2DEF558491F6B259183353
History
DateUserTypeResult
2023-09-02Kevin_9611NF-PM1
B1=1000000, B2=1685121900
2023-04-16Kevin_9611NF-PM1
B1=90000, B2=116204550
2022-04-09Ethan O'ConnorNF-PM1
B1=50000, B2=2471370
2020-12-19curtiscCERT
PRP Certification
Proof certified good
2020-12-19mrhC-PRP
M1848221/27167307283687/3244285160029841275897 : B7F2DEF558491F6B
PRP proof power = 7
PRP: Verified
Proof certified good
2020-12-19PoaoF-ECM
Factor: 3244285160029841275897 / (ECM curve 3, B1=50000, B2=5000000, Sigma=6816602416883926)
2017-11-06ATHC-PRP
M1848221/27167307283687 : 190C4AF64A660866
PRP: Verified (Factored)
PRP without proof (not generated)
2017-10-04Oliver KruseC-PRP
M1848221/27167307283687 : 190C4AF64A660866
PRP: Verified (Factored)
PRP without proof (not generated)