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

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Exponent Range:










MnStatusDetails
4572727Factored
FactorDigitsBitsDate
41425235299989263419635245444949369736118.32017-03-28 18:37:22
ECM
DigitsB1Curves
255000012 / 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)1998-03-17Jay SchneiderA9D051C09340454F0
Verified (Factored)2000-12-14Carl MikkelsenA9D051C09340454F2100488
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-11-18Oliver KruseD27A0DE38F6F5EEE1170707553
Verified2018-01-03kkmrkkblmbrbkD27A0DE38F6F5EEE1371900053
P-1 factors
DateFactorB1B2
2017-03-28414252352999892634196352454449493697198820361634303
History
DateUserTypeResult
2018-01-03kkmrkkblmbrbkC-PRP
M4572727/414252352999892634196352454449493697 : D27A0DE38F6F5EEE
PRP: Verified
PRP without proof (not generated)
2017-11-18Oliver KruseC-PRP
M4572727/414252352999892634196352454449493697 : D27A0DE38F6F5EEE
PRP: Verified
PRP without proof (not generated)
2017-03-28Ismo LaitelaF-PM1
Factor: 414252352999892634196352454449493697 / (P-1, B1=1988203, B2=61634303, E=12)
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-07-02snme2pm1NF
no factor from 2^65 to 2^66
2014-12-23monstNF
no factor from 2^64 to 2^65
2014-12-22JayderNF
no factor from 2^63 to 2^64
2012-01-08GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-08-23markrNF
no factor from 2^61 to 2^62
2010-06-29markrNF-PM1
B1=95000, B2=2018750, E=6