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

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Exponent Range:










MnStatusDetails
4483891Factored
FactorDigitsBitsDate
725690139672203477191879300959117180137122.42021-08-26 07:55:40
ECM
DigitsB1Curves
25500009 / 280
Estimated T-Level: 20.2 ⓘ
TF below 2^62 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)1999-10-07Eric Hahn4D545E7E32FC498720513
Verified (Factored)2001-04-15arnaud4D545E7E32FC49872768635
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2021-08-28LaurVB58F702AD829183E1350909553
P-1 factors
DateFactorB1B2
2021-08-26725690139672203477191879300959117180110712789521607127
History
DateUserTypeResult
2021-08-28LordJuliusCERT
PRP Certification
Proof certified good
2021-08-28LaurVC-PRP
M4483891/7256901396722034771918793009591171801 : B58F702AD829183E
PRP proof power = 7
PRP: Verified
Proof certified good
2021-08-26LaurVF-PM1
Factor: 7256901396722034771918793009591171801 / (P-1, B1=10712789, B2=521607127)
2021-08-09SRBaseNF
no factor from 2^70 to 2^71
2021-07-29axnNF
no factor from 2^69 to 2^70
2021-06-21TJAOINF
no factor from 2^68 to 2^69
2018-06-24ramgeisNF
no factor from 2^67 to 2^68
2018-06-24ramgeisNF
no factor from 2^66 to 2^67
2016-12-25mikrNF-PM1
B1=1800000, B2=68000000, E=12
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-06-26snme2pm1NF
no factor from 2^65 to 2^66
2014-09-30monstNF
no factor from 2^64 to 2^65
2014-09-29JayderNF
no factor from 2^63 to 2^64
2012-02-10GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-09-30markrNF
no factor from 2^61 to 2^62
2010-08-27markrNF-PM1
B1=95000, B2=2113750, E=6