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

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MnStatusDetails
1088431Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
954355692356116563681655212686.32022-04-03 16:59:08
ECM
DigitsB1Curves
2550000280 / 280
3025000099 / 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)John Guin76FCF27544BD8B550
Verified (Factored)Cornelius Caesar76FCF27544BD8B550
Verified (Factored)2004-01-27Brian J. Beesley76FCF27544BD8B55862705
Verified (Factored)2016-06-01MadPoo76FCF27544BD8B5589978
PRP
StatusDateUserResidueShiftTypeBase
Verified (Factored)2025-09-01KrieselAC42A637A0EA906C013
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2022-04-03SRJ2877AC42A637A0EA906C1106378953
Verified2022-04-04nullcureAC42A637A0EA906C145606553
P-1 factors
DateFactorB1B2
2022-04-03954355692356116563681655212700000069046782420
History
DateUserTypeResult
2025-09-01AnonymousCERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-01KrieselC-PRP
AC42A637A0EA906C
PRP proof power = 6
PRP: Verified (Factored)
Proof certified good
2022-04-04MicheCERT
PRP Certification
Proof certified good
2022-04-04nullcureC-PRP
M1088431/95435569235611656368165521 : AC42A637A0EA906C
PRP proof power = 6
PRP: Verified
Proof certified good
2022-04-03professor-lCERT
PRP Certification
Proof certified good
2022-04-03SRJ2877C-PRP
M1088431/95435569235611656368165521 : AC42A637A0EA906C
PRP proof power = 6
PRP: Verified
Proof certified good
2022-04-03axnF-PM1
Factor: 95435569235611656368165521 / (P-1, B1=27000000, B2=69046782420)
2018-11-13JossNF-PM1
B1=1088431, B2=130611720, E=12
2018-04-07JossNF-PM1
B1=1088431, B2=108843100, E=12
2016-07-27Bruno VictalNF-PM1
B1=2500000, B2=62500000, E=12
2016-07-22Bruno VictalNF-PM1
B1=2500000, B2=62500000, E=12
2016-06-09JossNF-PM1
B1=1011985, B2=30000000, E=12
2016-06-01MadPooC-LL
76FCF27544BD8B55
2016-03-29JossNF-PM1
B1=1011985
2016-03-23JossNF-PM1
B1=843321
2016-02-23Mark RoseNF
no factor from 2^57 to 2^60
2015-10-16Bruno VictalNF-PM1
B1=500000, B2=15000000, E=12
2014-11-06JossNF-PM1
B1=317938
2014-08-21JossNF-PM1
B1=258969
2014-04-01Never Odd Or EvenNF
no factor from 2^70 to 2^71
2013-11-20Never Odd Or EvenNF
no factor from 2^69 to 2^70
2013-11-20Never Odd Or EvenNF
no factor from 2^68 to 2^69
2013-10-24Never Odd Or EvenNF
no factor from 2^67 to 2^68
2013-10-24Never Odd Or EvenNF
no factor from 2^66 to 2^67
2013-10-24Never Odd Or EvenNF
no factor from 2^65 to 2^66
2013-10-07David CampeauNF
no factor from 2^64 to 2^65
2013-05-05Never Odd Or EvenNF
no factor from 2^63 to 2^64
2012-12-30dbaughNF
no factor from 2^62 to 2^63
2012-01-01bcp19NF-PM1
B1=200000, B2=10000000, E=12
2010-11-17Michael CNF
no factor from 2^61 to 2^62
2009-02-17Sturle SundeNF
no factor from 2^60 to 2^61