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
28393Factored
FactorDigitsBitsDate
133042597705811385532063.5old
449802179324464586186155483089145734111.82018-02-18 16:08:50
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
403000000661 / 4588
Estimated T-Level: 35.7
TF below 2^114 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-09-21Oliver KruseA0569BFEC182258B1013
Verified (Factored)2017-10-12kkmrkkblmbrbkA0569BFEC182258B1782313
Verified2018-02-21Oliver KruseEFE338459BE67D4822031453
Verified2018-02-21kkmrkkblmbrbkEFE338459BE67D4822649753
History
DateUserTypeResult
2023-02-18nordiNF-PM1
B1=3000000000, B2=925584566816910
2022-10-10nordiNF-PM1
B1=3000000000
2018-02-21kkmrkkblmbrbkC-PRP
M28393/13304259770581138553/4498021793244645861861554830891457 : EFE338459BE67D48
PRP: Verified
PRP without proof (small exponent)
2018-02-21Oliver KruseC-PRP
M28393/13304259770581138553/4498021793244645861861554830891457 : EFE338459BE67D48
PRP: Verified
PRP without proof (small exponent)
2018-02-18nordiF-ECM
Factor: 4498021793244645861861554830891457 / (ECM curve 191, B1=3000000, B2=300000000)
2017-10-12kkmrkkblmbrbkC-PRP
M28393/13304259770581138553 : A0569BFEC182258B
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M28393/13304259770581138553 : A0569BFEC182258B
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M28393/13304259770581138553 : A0569BFEC182258B
PRP without proof (not generated)
2016-12-28kkmrkkblmbrbkNF-PM1
B1=500000000, B2=10000000000, E=12