Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:





MnDetails
17761
Composite: proven not-prime with Lucas-Lehmer test
No factors below 266
TF target 244
P-1
B1 = 1000000000000
B2 = 1402034650733706990
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
504400000016550 / 16550
551100000008467 / 40830
Estimated T-Level: 51.0 ⓘ
TF below 2^165 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShiftSoftware
VerifiedUnknown39E20Unknown,(aka U)
VerifiedGeorge WoltmanC20DF650F99339E20Woltman,Prime95,first web release,(aka W4)
VerifiedBrian J. BeesleyC20DF650F99339E20Mac,John Sweeney,v1.4,(aka J3)
Verified2015-04-11MadPoo 🙂C20DF650F99339E211110Windows 64-bit,Prime95,v26,(aka We4)
History
DateUserTypeResult
2024-09-25-anonymous-NF-PM1B1=1000000000000, B2=1402034650733706990
2023-08-28masserNF-PP1Start=6/5, B1=430000000, B2=76970000000
2023-07-08masserNF-PP1Start=156/11, B1=430000000, B2=17200000000
2022-04-29-anonymous-NF-PM1B1=100000000000, B2=80107051974399450
2022-02-23Ruslan BorisovNFno factor TF: 65-66
2021-05-12ATHNF-PP1Start=2/7, B1=1000000000, B2=241000000000
2021-02-13Ruslan BorisovNFno factor TF: 64-65
2019-05-20alexNF-PM1B1=10000000000, B2=500000000000, E=12
2018-07-27snme2pm1NFno factor TF: 63-64
2016-12-23James HintzNF-PM1B1=1873485798, B2=116156119476, E=12
2016-05-08Sid & AndyNFno factor TF: 62-63
2016-02-23LaurVNFno factor TF: 57-58
2015-05-11snme2pm1NFno factor TF: 61-62
2015-04-11MadPoo 🙂C-LLC20DF650F99339E2
2015-02-13JayderNF-PM1B1=1172220000, B2=35360118869, E=12
2013-11-16David CampeauNF-PM1B1=1172220000
2013-11-11David CampeauNF-PM1B1=937775000
2013-10-29David CampeauNF-PM1B1=703330000
2012-12-25bcp19NFno factor TF: 60-61
2012-12-12SRJ2877NF-PM1B1=500000000
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
2002-10-19-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
1999-10-15-anonymous-NFno factor TF: 52-53