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
4399973Factored
FactorDigitsBitsDate
43533663814640463755119211692891.82022-12-27 06:22:50
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)1998-07-11INTERSHOP Communications69F846257B02FC770
Verified (Factored)2000-03-01Ben Mathews69F846257B02FC772300308
Verified (Factored)2000-06-11Doug Powell69F846257B02FC771651856
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2023-01-01rucioE6A1A2F6AE287D0E194673753
P-1 factors
DateFactorB1B2
2022-12-274353366381464046375511921169620000029438922240
History
DateUserTypeResult
2023-01-01curtiscCERT
PRP Certification
Proof certified good
2023-01-01rucioC-PRP
M4399973/4353366381464046375511921169 : E6A1A2F6AE287D0E
PRP proof power = 7
PRP: Verified
Proof certified good
2022-12-27DRobinsonPEF-PM1
Factor: 4353366381464046375511921169 / (P-1, B1=6200000, B2=29438922240)
2021-02-11-Anonymous-NF
no factor from 2^72 to 2^73
2021-01-31-Anonymous-NF
no factor from 2^71 to 2^72
2021-01-31-Anonymous-NF
no factor from 2^70 to 2^71
2021-01-25-Anonymous-NF
no factor from 2^69 to 2^70
2021-01-25-Anonymous-NF
no factor from 2^68 to 2^69
2018-12-19Ismo LaitelaNF-PM1
B1=2237739, B2=62656681, E=12
2018-10-30chuenkitNF
no factor from 2^67 to 2^68
2018-05-07chuenkitNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-06-20snme2pm1NF
no factor from 2^65 to 2^66
2014-07-03lycornNF
no factor from 2^64 to 2^65
2014-07-03JayderNF
no factor from 2^63 to 2^64
2012-02-29GrunwalderGIMPNF
no factor from 2^1 to 2^63
2012-01-14Squeeky_SquirrelNF-PM1
B1=110000, B2=2255000, E=6
2010-11-02markrNF
no factor from 2^61 to 2^62
2009-07-31Carsten KossendeyNF-PM1
B1=25000, B2=356250