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
6247
Composite: proven not-prime with Lucas-Lehmer test
No factors below 266
TF target 244
P-1
B1 = 2400000000000
B2 = 7202710403265967590
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
504400000016550 / 16550
5511000000040830 / 40830
6026000000041223 / 105362
Estimated T-Level: 57.0 ⓘ
TF below 2^184 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShiftSoftware
VerifiedUnknown013A0Unknown,(aka U)
VerifiedGeorge Woltman5433E64B0AD5813A0Woltman,Prime95,first web release,(aka W4)
VerifiedBrian J. Beesley5433E64B0AD5813A0Mac,John Sweeney,v1.4,(aka J3)
Verified2015-04-11MadPoo 🙂5433E64B0AD5813A715Windows 64-bit,Prime95,v26,(aka We4)
History
DateUserTypeResult
2025-01-24One ManNF-PM1B1=479141366644, B2=512874242553923250
2025-01-08-anonymous-NF-PM1B1=2400000000000, B2=7202710403265967590
2023-08-17masserNF-PP1Start=6/5, B1=1390000000, B2=248810000000
2023-08-01-anonymous-NF-PM1B1=39000000000, B2=163113042636343800
2023-07-14masserNF-PM1B1=72000000000, B2=110837175002954400
2023-07-10masserNF-PP1Start=152/43, B1=1390000000, B2=55600000000
2022-04-09Anton RepkoNFno factor TF: 64-66
2021-05-12ATHNF-PP1Start=2/7, B1=1000000000, B2=241000000000
2021-01-31Ruslan BorisovNFno factor TF: 64-65
2017-09-14snme2pm1NFno factor TF: 63-64
2016-12-02-anonymous-NF-PM1B1=100000000000, B2=1000000000000, E=12
2016-10-22snme2pm1NFno factor TF: 62-63
2016-02-23LaurVNFno factor TF: 57-58
2015-07-28Sid & AndyNFno factor TF: 61-62
2015-05-20MadPoo 🙂NF-PM1B1=100000000000
2015-04-11MadPoo 🙂C-LL5433E64B0AD5813A
2012-10-11bcp19NFno factor TF: 60-61
2011-12-10nextPrimeNF-PM1B1=10000000000
2010-12-30monstNFno factor TF: 58-60
2003-01-25-anonymous-NF-PM1B1=4290000000
2002-12-31-anonymous-NFno factor TF: 1-57
2002-10-07-anonymous-NF-PM1B1=3221225472, B2=4290000000, E=48
2002-08-17-anonymous-NF-PM1B1=2147483648, B2=4290000000, E=48
2002-06-02-anonymous-NF-PM1B1=1073741824, B2=4290000000, E=48
2001-08-18-anonymous-NF-PM1B1=3000000000, B2=4290000000
2001-06-17-anonymous-NF-PM1B1=43000000, B2=4290000000
2001-02-11-anonymous-NF-PM1B1=1000000, B2=100000000
2000-07-25-anonymous-NFno factor TF: 1-56
2000-02-16-anonymous-NFno factor TF: 54-55
1999-12-30-anonymous-NFno factor TF: 53-54
1999-09-22-anonymous-NFno factor TF: 52-53