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
327443Factored
FactorDigitsBitsDate
1988667819515204612395960275773097.32011-03-13 17:44:54
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000218 / 1566
Estimated T-Level: 30.7 ⓘ
TF below 2^97 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)David Slowinski7E330
Verified (Factored)Unknown7E330
Verified (Factored)Guillermo Ballester ValorB4F24DEC7DB37E330
Verified (Factored)Klaus KastensB4F24DEC7DB37E330
Verified (Factored)Eivind TrielB4F24DEC7DB37E33180278
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-22Oliver Kruse81A22B201DE6585A1013
Verified2017-10-13Oliver Kruse81A22B201DE6585A127257113
Verified2017-12-12ATH81A22B201DE6585A112886713
Unverified (Reliable)2020-04-18Oliver Kruse41F16B78B65239__14692353
History
DateUserTypeResult
2023-03-23Denial140NF-PM1
B1=1000000, B2=20563492950
2022-03-07LordJuliusNF
no factor from 2^54 to 2^55
2020-04-18Oliver KruseC-PRP
M327443/198866781951520461239596027577 : 41F16B78B65239__
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-12-12ATHC-PRP
M327443/198866781951520461239596027577 : 81A22B201DE6585A
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-10-13Oliver KruseC-PRP
M327443/198866781951520461239596027577 : 81A22B201DE6585A
PRP: Unverified (Reliable)
PRP without proof (small exponent)
2017-09-22Oliver KruseC-PRP
M327443/198866781951520461239596027577 : 81A22B201DE6585A
PRP: Unverified (Reliable)
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M327443/198866781951520461239596027577 : 81A22B201DE6585A
PRP without proof (not generated)
2011-03-13Sturle SundeF-ECM
Factor: 198866781951520461239596027577
2009-01-24Sturle SundeNF
no factor from 2^59 to 2^60
2008-12-30Sturle SundeNF
no factor from 2^58 to 2^59