Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
2305463Factored
FactorDigitsBitsDate
73254145897046693844262812582.62017-01-10 15:38:19
ECM
DigitsB1Curves
255000081 / 280
Estimated T-Level: 21.4 ⓘ
TF below 2^66 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)David CucizE75EE2D8C2061AA80
Verified (Factored)1999-03-15Michael BossE75EE2D8C2061AA81603349
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-10-11Oliver KruseD4F5C20A63C748641013
Verified2017-11-29kkmrkkblmbrbkD4F5C20A63C748641208597613
History
DateUserTypeResult
2021-06-11ViliamFNF-PM1
B1=5000000, B2=505000000
2018-02-18alpertronNF-PM1
B1=500000, B2=15000000, E=12
2017-11-29kkmrkkblmbrbkC-PRP
M2305463/7325414589704669384426281 : D4F5C20A63C74864
PRP: Verified
PRP without proof (not generated)
2017-10-11Oliver KruseC-PRP
M2305463/7325414589704669384426281 : D4F5C20A63C74864
PRP: Verified
PRP without proof (not generated)
2017-01-10bamF-ECM
Factor: 7325414589704669384426281 / (ECM curve 2, B1=50000, B2=5000000)
2016-02-23Mark RoseNF
no factor from 2^1 to 2^60
2015-10-22ramgeisNF
no factor from 2^65 to 2^66
2015-02-27VictordeHollanderNF
no factor from 2^64 to 2^65
2015-02-27VictordeHollanderNF
no factor from 2^63 to 2^64
2013-12-06Jerry HallettNF
no factor from 2^62 to 2^63
2012-05-13Sebastian HornbostelNF
no factor from 2^61 to 2^62
2010-02-12BudNF-PM1
B1=500000, B2=10000000, E=12
2009-01-16Sturle SundeNF
no factor from 2^60 to 2^61