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
4178483TF
No factors below 271
TF target 265
P-1
B1 = 16236805
B2 = 1964653405
ECM
DigitsB1Curves
255000076 / 280
Estimated T-Level: 21.4 ⓘ
LL
StatusDateUserResidueShift
Verified1998-06-28Robert Friberg4A3B7A3D9E1ADAB60
Verified1999-10-07Andrew China4A3B7A3D9E1ADAB62635614
History
DateUserTypeResult
2022-05-27mikrNF
no factor from 2^70 to 2^71
2021-07-08axnNF
no factor from 2^69 to 2^70
2021-06-28TJAOINF
no factor from 2^68 to 2^69
2021-03-07Zhang RuichongNF-PM1
B1=16236805, B2=1964653405
2018-12-07YxinityNF
no factor from 2^67 to 2^68
2017-12-21YxinityNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-06-05snme2pm1NF
no factor from 2^65 to 2^66
2013-11-09David CampeauNF
no factor from 2^64 to 2^65
2013-10-17JayderNF
no factor from 2^63 to 2^64
2013-08-16Squeeky_SquirrelNF-PM1
B1=125000, B2=2406250, E=6
2011-08-22USAFSSNF-PM1
B1=45000, B2=630000, E=6
2011-07-17GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-02-01Grant McCrackenNF
no factor from 2^61 to 2^62
2009-08-04Carsten KossendeyNF-PM1
B1=25000, B2=337500