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

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MnStatusDetails
2828741Composite, with 4 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
990059351929.9old
35019813591031.72008-09-07 19:42:10
271785435291134.72008-09-07 19:42:10
964560991389833977992066.42020-02-27 12:49:46
ECM
DigitsB1Curves
255000060 / 280
Estimated T-Level: 21.1
TF below 2^65 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-10-22Oliver Kruse8F1FA04FAB719245322485953
Verified (Factored)2017-12-07kkmrkkblmbrbk8F1FA04FAB719245331884953
Verified2020-02-28Niels_Mache_Nextcloud8F1FA04FAB7192454132331253
Verified2020-02-28Jinyuan Wang8F1FA04FAB7192454156634253
History
DateUserTypeResult
2023-01-30USAFSSNF-PM1
B1=360000, B2=287380170
2020-02-28Jinyuan WangC-PRP
M2828741/990059351/3501981359/27178543529/96456099138983397799 : 8F1FA04FAB719245
PRP: Verified
PRP without proof (not generated)
2020-02-28Niels_Mache_NextcloudC-PRP
M2828741/990059351/3501981359/27178543529/96456099138983397799 : 8F1FA04FAB719245
PRP: Verified
PRP without proof (not generated)
2020-02-27TJAOIF
Factor: 96456099138983397799 / TF: 66-67
2017-12-07kkmrkkblmbrbkC-PRP
M2828741/990059351/3501981359/27178543529 : 8F1FA04FAB719245
PRP: Verified
PRP without proof (not generated)
2017-10-22Oliver KruseC-PRP
M2828741/990059351/3501981359/27178543529 : 8F1FA04FAB719245
PRP: Verified
PRP without proof (not generated)
2008-09-07Will EdgingtonF
Factor: 27178543529
2008-09-07Will EdgingtonF
Factor: 3501981359