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
9857
Composite: proven not-prime with Lucas-Lehmer test
No factors below 266
TF target 244
P-1
B1 = 58000000000
B2 = 245990366716444350
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
504400000016550 / 16550
551100000008143 / 40830
Estimated T-Level: 51.0 ⓘ
TF below 2^164 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShiftSoftware
VerifiedUnknown275B0Unknown,(aka U)
VerifiedGeorge Woltman05646A61B1A6A75B0Woltman,Prime95,first web release,(aka W4)
VerifiedBrian J. Beesley05646A61B1A6A75B0Mac,John Sweeney,v1.4,(aka J3)
Verified2015-04-11MadPoo 🙂05646A61B1A6A75B7068Windows 64-bit,Prime95,v26,(aka We4)
History
DateUserTypeResult
2024-07-17One ManNF-PM1B1=58156361227, B2=36101823593605770
2023-08-20masserNF-PP1Start=6/5, B1=830000000, B2=148570000000
2023-07-09masserNF-PP1Start=199/43, B1=830000000, B2=33200000000
2023-06-13JacobZNF-PM1B1=58000000000, B2=245990366716444350
2022-06-15Anton RepkoNFno factor TF: 64-66
2021-05-13ATHNF-PP1Start=2/7, B1=1000000000, B2=241000000000
2021-01-01Ruslan BorisovNFno factor TF: 64-65
2018-02-06snme2pm1NFno factor TF: 63-64
2017-01-04mikrNF-PM1B1=60000000000, B2=4800000000000, E=12
2016-11-03-anonymous-NF-PM1B1=100000000000, B2=1000000000000, E=12
2016-10-30-anonymous-NF-PM1B1=40000000000, B2=400000000000, E=12
2016-10-30-anonymous-NF-PM1B1=20000000000, B2=200000000000, E=12
2016-05-18-anonymous-NF-PM1B1=10000000000, B2=100000000000, E=12
2016-02-23LaurVNFno factor TF: 57-58
2015-04-11MadPoo 🙂C-LL05646A61B1A6A75B
2015-02-11JayderNF-PM1B1=1359491973, B2=80210026404, E=12
2015-01-20LaurVNFno factor TF: 62-63
2015-01-05LaurVNFno factor TF: 61-62
2012-11-08bcp19NFno factor TF: 60-61
2010-07-20George WoltmanNFno factor TF: 59-60
2010-07-20George WoltmanNFno factor TF: 58-59
2003-03-16-anonymous-NF-PM1B1=4290000000
2002-12-09-anonymous-NFno factor TF: 1-57
2002-11-09-anonymous-NF-PM1B1=3221225472, B2=4290000000, E=48
2002-09-07-anonymous-NF-PM1B1=2147483648, B2=4290000000, E=48
2002-06-23-anonymous-NF-PM1B1=1073741824, B2=4290000000, E=48
2001-07-07-anonymous-NF-PM1B1=3000000000, B2=4290000000
2001-06-30-anonymous-NF-PM1B1=43000000, B2=4290000000
2001-02-11-anonymous-NF-PM1B1=1000000, B2=100000000
2000-06-29-anonymous-NFno factor TF: 1-56
2000-06-28-anonymous-NFno factor TF: 1-56
2000-03-01-anonymous-NFno factor TF: 54-55
1999-12-30-anonymous-NFno factor TF: 53-54
1999-09-22-anonymous-NFno factor TF: 52-53