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

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MnStatusDetails
1854317Factored
FactorDigitsBitsDate
287134240631979895610280072684.62016-11-22 19:11:06
ECM
DigitsB1Curves
2550000280 / 280
30250000107 / 640
Estimated T-Level: 25.8 ⓘ
TF below 2^81 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Alex van Renesse1D4948DC7572A2D90
Verified (Factored)1998-12-13Greg Hewgill1D4948DC7572A2D91740518
Verified (Factored)2015-06-27MadPoo1D4948DC7572A2D9189860
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-10-04Oliver Kruse26BD04A2EE0359001013
Verified2017-11-07kkmrkkblmbrbk26BD04A2EE03590019560513
History
DateUserTypeResult
2017-11-07kkmrkkblmbrbkC-PRP
M1854317/28713424063197989561028007 : 26BD04A2EE035900
PRP: Verified
PRP without proof (not generated)
2017-10-04Oliver KruseC-PRP
M1854317/28713424063197989561028007 : 26BD04A2EE035900
PRP: Verified
PRP without proof (not generated)
2016-11-22bamF-ECM
Factor: 28713424063197989561028007 / (ECM curve 2, B1=50000, B2=5000000)
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2016-02-23Mark RoseNF
no factor from 2^61 to 2^62
2015-09-09ramgeisNF
no factor from 2^65 to 2^66
2015-07-21mikrNF-PM1
B1=2780000, B2=91760000, E=12
2015-06-27MadPooC-LL
1D4948DC7572A2D9
2015-05-06snme2pm1NF
no factor from 2^64 to 2^65
2015-05-06snme2pm1NF
no factor from 2^63 to 2^64
2014-09-25JossNF-PM1
B1=169226
2014-05-26JossNF-PM1
B1=134613
2011-02-10Carsten KossendeyNF-PM1
B1=100000, B2=1700000, E=6
2011-01-21GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-04-13Architects CubedNF
no factor from 2^60 to 2^61