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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Exponent Range:










MnStatusDetails
1552207Factored
FactorDigitsBitsDate
1095855992558324194554993292786.52016-07-07 00:44:00
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)Rich Harms13282F1457C688090
Verified (Factored)1998-12-27Ethan Hansen13282F1457C68809918728
Verified (Factored)2015-07-03MadPoo13282F1457C68809739021
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-10-01Oliver KruseF176EDFD84B2F0371013
Verified2017-10-30kkmrkkblmbrbkF176EDFD84B2F037119944213
History
DateUserTypeResult
2017-10-30kkmrkkblmbrbkC-PRP
M1552207/109585599255832419455499329 : F176EDFD84B2F037
PRP: Verified
PRP without proof (not generated)
2017-10-01Oliver KruseC-PRP
M1552207/109585599255832419455499329 : F176EDFD84B2F037
PRP: Verified
PRP without proof (not generated)
2016-07-07VictordeHollanderF-ECM
Factor: 109585599255832419455499329 / (ECM curve 192, B1=50000, B2=5000000)
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2016-02-23Mark RoseNF
no factor from 2^61 to 2^62
2015-10-11ramgeisNF
no factor from 2^65 to 2^66
2015-07-03MadPooC-LL
13282F1457C68809
2015-03-25VictordeHollanderNF-PM1
B1=10000000, B2=200000000, E=12
2015-02-17snme2pm1NF
no factor from 2^64 to 2^65
2015-02-17snme2pm1NF
no factor from 2^63 to 2^64
2013-12-05David CampeauNF-PM1
B1=920000, B2=26680000, E=12
2010-07-04GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-04-30Architects CubedNF
no factor from 2^60 to 2^61