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

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MnStatusDetails
2216611Factored
FactorDigitsBitsDate
406012300082282206092065.12013-06-07 04:20:55
ECM
DigitsB1Curves
255000090 / 280
Estimated T-Level: 21.6 ⓘ
TF below 2^67 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Robert ClarkE14A37E9A9D1570D0
Verified (Factored)1999-02-14Jamie EckmanE14A37E9A9D1570D185997
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-10-11kkmrkkblmbrbkAFE1CABAB63AF6AD1212112253
Verified2017-10-26Oliver KruseAFE1CABAB63AF6AD1131722653
History
DateUserTypeResult
2022-03-09LordJuliusNF
no factor from 2^1 to 2^60
2017-10-26Oliver KruseC-PRP
M2216611/40601230008228220609 : AFE1CABAB63AF6AD
PRP: Verified
PRP without proof (not generated)
2017-10-11kkmrkkblmbrbkC-PRP
M2216611/40601230008228220609 : AFE1CABAB63AF6AD
PRP: Verified
PRP without proof (not generated)
2016-04-25alpertronNF-PM1
B1=500000, B2=15000000, E=12
2013-06-07jim f in mnF-ECM
Factor: 40601230008228220609
2013-01-23dbaughNF
no factor from 2^62 to 2^63
2012-04-18Sebastian HornbostelNF
no factor from 2^61 to 2^62
2010-12-19Oscar ÖstlinNF-PM1
B1=85000, B2=1593750, E=6
2010-10-11Oscar ÖstlinNF-PM1
B1=75011
2009-01-11Sturle SundeNF
no factor from 2^60 to 2^61