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

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Exponent Range:





MnDetails
16493
Composite, with 1 known prime factor. Cofactor is composite.
Trial Factored to 268
TF target 244
Factored
FactorDigitsBitsDate
99763325227948921624221456819734734182776268981889103354179.42023-08-06 12:46:03
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
504400000010359 / 16550
Estimated T-Level: 48.1 ⓘ
TF below 2^155 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShiftSoftware
FactoredUnknown66A30Unknown,(aka U)
FactoredGeorge Woltman53912DBD3D7AE6A30Woltman,Prime95,first web release,(aka W4)
FactoredBrian J. Beesley53912DBD3D7AE6A30Mac,John Sweeney,v1.4,(aka J3)
Factored2015-04-11MadPoo 🙂53912DBD3D7AE6A37346Windows 64-bit,Prime95,v26,(aka We4)
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors		ShiftTypeBase
Verified
No proof (small exponent)
2023-08-08Ryan Propper00354A780D17D0C31338553
Verified
No proof (small exponent)
2023-08-08Naegi Makoto00354A780D17D0C31705053
History
DateUserTypeResult
2023-10-23-anonymous-NF-PM1B1=1000000000000, B2=1402034650733706990
2023-08-08Naegi MakotoC-PRPM16493/997633252279489216242214568197347341827762689818891033 : 00354A780D17D0C3
2023-08-08Ryan PropperC-PRPM16493/997633252279489216242214568197347341827762689818891033 : 00354A780D17D0C3
2023-08-06Ryan PropperF-ECMFactor: 997633252279489216242214568197347341827762689818891033 / ECM curve 5, B1=260000000, B2=8517102008415, Montgomery Sigma=8107949497305737
2023-07-08masserNF-PP1Start=174/37, B1=460000000, B2=18400000000
2022-04-23-anonymous-NF-PM1B1=100000000000, B2=100609955472526500
2022-01-16Ruslan BorisovNFno factor TF: 65-66
2021-05-10ATHNF-PP1Start=2/7, B1=1000000000, B2=241000000000
2021-02-10Ruslan BorisovNFno factor TF: 64-65
2018-10-23snme2pm1NFno factor TF: 63-64
2016-08-18BloodIceNF-PM1B1=100000000000, B2=5000000000000, E=12
2016-08-10BloodIceNF-PM1B1=100000000000
2016-08-06BloodIceNF-PM1B1=50000000000
2016-05-28Sid & AndyNFno factor TF: 62-63
2016-05-09JossNF-PM1B1=997402528, B2=49870126400, E=12
2016-05-02JossNF-PM1B1=997402528, B2=17953245504, E=12
2016-02-23LaurVNFno factor TF: 57-58
2015-08-28snme2pm1NFno factor TF: 61-62
2015-04-11MadPoo 🙂C-LL53912DBD3D7AE6A3
2012-12-25bcp19NFno factor TF: 60-61
2012-10-12JossNF-PM1B1=498701264, B2=49870126400, E=12
2010-06-22anonymousNFno factor TF: 59-60
2010-06-22anonymousNFno factor TF: 58-59
2003-09-29-anonymous-NF-PM1B1=8388608, B2=838860800, E=12
2003-09-29-anonymous-NF-PM1B1=16777216, B2=1677721600, E=12
2003-07-06-anonymous-NF-PM1B1=4194304, B2=419430400, E=12
2003-05-19-anonymous-NF-PM1B1=2097152, B2=209715200, E=12
2003-04-27-anonymous-NF-PM1B1=1048576, B2=104857600, E=48
2003-04-03-anonymous-NF-PM1B1=524288, B2=52428800, E=48
2003-03-27-anonymous-NF-PM1B1=262144, B2=26214400, E=30
2003-02-02-anonymous-NF-PM1B1=131072, B2=13107200, E=30
2002-10-12-anonymous-NFno factor TF: 1-57
2002-07-14-anonymous-NF-PM1B1=65536, B2=6553600, E=12
2002-06-09-anonymous-NF-PM1B1=32768, B2=3276800
2002-04-28-anonymous-NF-PM1B1=16384, B2=1638400
2001-08-18Alex KruppaNF-PM1B1=1000000, B2=100000000
2001-07-29Alex KruppaNF-PM1B1=1000000, B2=100000000
2001-04-29-anonymous-NF-PM1B1=100000, B2=10000000
2000-09-23-anonymous-NFno factor TF: 1-56
2000-03-08-anonymous-NFno factor TF: 53-54
1999-09-22-anonymous-NFno factor TF: 52-53