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
178289Factored
FactorDigitsBitsDate
69889289826.1old
189238051975991444.12008-07-27 10:49:40
8813649868987559271859.62009-01-25 15:09:16
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000202 / 1566
Estimated T-Level: 30.6 ⓘ
TF below 2^97 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-22Oliver KruseD01595171B6B92813013
Verified2017-09-22Oliver KruseD01595171B6B92813013
Verified2017-11-06kkmrkkblmbrbkD01595171B6B92813965613
Verified2020-04-17Oliver KruseFF20EBE495B3068631079253
Verified2024-02-03Wentao HuangFF20EBE495B30686315562953
History
DateUserTypeResult
2024-02-03Naegi MakotoCERT
PRP Certification
Proof certified good
2024-02-03Wentao HuangC-PRP
M178289/69889289/18923805197599/881364986898755927 : FF20EBE495B30686
PRP proof power = 5
PRP: Verified
Proof certified good
2020-04-17Oliver KruseC-PRP
M178289/69889289/18923805197599/881364986898755927 : FF20EBE495B30686
PRP: Verified
PRP without proof (small exponent)
2017-11-06kkmrkkblmbrbkC-PRP
M178289/69889289/18923805197599/881364986898755927 : D01595171B6B9281
PRP: Verified
PRP without proof (small exponent)
2017-09-22Oliver KruseC-PRP
M178289/69889289/18923805197599/881364986898755927 : D01595171B6B9281
PRP: Verified
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M178289/69889289/18923805197599/881364986898755927 : D01595171B6B9281
PRP without proof (not generated)
2017-06-01kkmrkkblmbrbkNF-PM1
B1=100000000, B2=2000000000, E=12
2009-01-25George WoltmanF-ECM
Factor: 881364986898755927
2008-07-27J FeitsmaF
Factor: 18923805197599