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

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MnStatusDetails
195253Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
3028555187042210149345986521286623576604741134.52023-04-15 08:46:16
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000502 / 1566
Estimated T-Level: 31.6 ⓘ
TF below 2^100 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Amdahl 6 - 198938CBF02D0
Verified (Factored)Martin Eibl18F7C37838CBF02D0
Verified (Factored)Brian J. Beesley18F7C37838CBF02D0
Verified (Factored)Eivind Triel18F7C37838CBF02D137777
Verified (Factored)2016-06-01MadPoo18F7C37838CBF02D154238
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2023-04-15JacobZ25712BEB28F5328C11123253
Verified2023-08-24USAFSS25712BEB28F5328C13966153
P-1 factors
DateFactorB1B2
2023-04-15302855518704221014934598652128662357660471368859288148114134160
History
DateUserTypeResult
2023-08-24WeakForceBosonCERT
PRP Certification
Proof certified good
2023-08-24USAFSSC-PRP
M195253/30285551870422101493459865212866235766047 : 25712BEB28F5328C
PRP proof power = 5
PRP: Verified
Proof certified good
2023-04-15curtiscCERT
PRP Certification
Proof certified good
2023-04-15JacobZC-PRP
M195253/30285551870422101493459865212866235766047 : 25712BEB28F5328C
PRP proof power = 5
PRP: Verified
Proof certified good
2023-04-15JacobZF-PM1
Factor: 30285551870422101493459865212866235766047 / (P-1, B1=136885928, B2=8148114134160)
2023-02-25masserNF-PP1
Start=6/5, B1=30000000, B2=840000000
2023-02-13masserNF-PP1
Start=171/31, B1=30000000, B2=840000000
2023-02-09masserNF-PP1
Start=2/7, B1=30000000, B2=990000000
2023-01-24JossNF-PM1
B1=1000000, B2=74759955270
2022-03-07LordJuliusNF
no factor from 2^54 to 2^55
2019-12-12Gordon SpenceNF
no factor from 2^65 to 2^66
2018-01-04BloodERazorNF
no factor from 2^64 to 2^65
2016-06-01MadPooC-LL
18F7C37838CBF02D
2016-02-23Mark RoseNF
no factor from 2^57 to 2^58
2015-12-02Gordon SpenceNF
no factor from 2^63 to 2^64
2015-12-02Gordon SpenceNF
no factor from 2^62 to 2^63
2015-08-25NRNF
no factor from 2^61 to 2^62
2013-10-07alpertronNF-PM1
B1=100000000, B2=2000000000, E=12
2013-08-12lycornNF
no factor from 2^60 to 2^61
2009-02-04axnNF-PM1
B1=5000000, B2=200000000, E=12
2009-01-25Sturle SundeNF
no factor from 2^59 to 2^60
2008-12-30Sturle SundeNF
no factor from 2^58 to 2^59