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
1258643Factored
FactorDigitsBitsDate
5062220060847818307739486502517216899338125.32022-04-26 03:52:07
ECM
DigitsB1Curves
2550000280 / 280
30250000104 / 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)George Woltman49BC0624B66454520
Verified (Factored)Simon Burge49BC0624B66454520
Verified (Factored)Brian J. Beesley49BC0624B6645452329573
Verified (Factored)2016-06-01MadPoo49BC0624B6645452980610
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2022-04-26aperson1C0FFB35542E01A16159912053
P-1 factors
DateFactorB1B2
2022-04-26506222006084781830773948650251721689933600000036000000
History
DateUserTypeResult
2022-04-26slandrumCERT
PRP Certification
Proof certified good
2022-04-26aperson1C-PRP
M1258643/50622200608478183077394865025172168993 : C0FFB35542E01A16
PRP proof power = 6
PRP: Verified
Proof certified good
2022-04-26Sid & AndyF-PM1
Factor: 50622200608478183077394865025172168993 / (P-1, B1=36000000)
2020-04-30Gordon SpenceNF
no factor from 2^67 to 2^68
2018-09-16YxinityNF
no factor from 2^66 to 2^67
2016-06-01MadPooC-LL
49BC0624B6645452
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2015-09-23ramgeisNF
no factor from 2^65 to 2^66
2015-04-07monstNF
no factor from 2^64 to 2^65
2015-04-07omylistNF
no factor from 2^63 to 2^64
2015-02-01mikrNF-PM1
B1=4218475, B2=156083565, E=12
2014-09-29JossNF-PM1
B1=250994
2012-10-11dbaughNF
no factor from 2^62 to 2^63
2011-05-09XyzzyNF
no factor from 2^61 to 2^62
2009-02-15Sturle SundeNF
no factor from 2^60 to 2^61