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
4928389Factored
FactorDigitsBitsDate
709688017929.4old
3571702076091238.42008-09-08 00:19:50
613531322312856234388872375.72019-08-12 01:54:46
ECM
DigitsB1Curves
25500002 / 280
Estimated T-Level: 20.0
TF below 2^62 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-09-20kkmrkkblmbrbkB2F72FA73C622C7E2013
Verified (Factored)2018-04-10ATHB2F72FA73C622C7E2328131913
Verified2019-08-12Niels_Mache_NextcloudE178FA5A350AD162390999953
Verified2019-08-14arnaudE178FA5A350AD1623353679553
History
DateUserTypeResult
2023-09-20USAFSSNF-PM1
B1=256000, B2=105522060
2019-08-14arnaudC-PRP
M4928389/709688017/357170207609/61353132231285623438887 : E178FA5A350AD162
PRP: Verified
PRP without proof (not generated)
2019-08-12Niels_Mache_NextcloudC-PRP
M4928389/709688017/357170207609/61353132231285623438887 : E178FA5A350AD162
PRP: Verified
PRP without proof (not generated)
2019-08-12ATHF-ECM
Factor: 61353132231285623438887 / (ECM curve 2, B1=50000, B2=5000000, Sigma=245005416039796)
2018-04-10ATHC-PRP
M4928389/709688017/357170207609 : B2F72FA73C622C7E
PRP: Verified
PRP without proof (not generated)
2017-09-20kkmrkkblmbrbkC-PRP
M4928389/357170207609/709688017 : B2F72FA73C622C7E
PRP: Verified
PRP without proof (not generated)
2008-09-08Will EdgingtonF
Factor: 357170207609