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

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Exponent Range:





MnDetails
1669
Composite, with 1 known prime factor. Cofactor is composite.
Trial Factored to 268
TF target 244
Factored
FactorDigitsBitsDate
11249375044341294174541057199624774173154445184553948881757186.22009-07-26 12:12:52
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000004588 / 4588
45110000009201 / 9201
504400000016550 / 16550
5511000000040830 / 40830
60260000000105362 / 105362
65800000000158226 / 194238
Estimated T-Level: 64.1 ⓘ
TF below 2^208 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShiftSoftware
FactoredUnknown3E8F0Unknown,(aka U)
FactoredGeorge Woltman56D373351121BE8F0Woltman,Prime95,first web release,(aka W4)
FactoredGord Palameta56D373351121BE8F1195Linux 32-bit,Prime95,v23,(aka WZ2)
PRP Cofactor
StatusProofDateUserResidueNumber of
known factors		ShiftTypeBase
Verified
No proof (small exponent)
2017-09-21Oliver KruseA51A6C81663663121013
Verified
No proof (small exponent)
2017-10-02kkmrkkblmbrbkA51A6C81663663121013
Verified
No proof (small exponent)
2017-12-07ATHA51A6C8166366312159613
Verified
No proof (small exponent)
2020-04-17Oliver Kruse3470CACADAE4A903171453
Verified
No proof (small exponent)
2020-08-12_p95holder_3470CACADAE4A903148453
History
DateUserTypeResult
2022-08-15mikrNF-PM1B1=400000000000, B2=1310778031989756330
2021-07-22ViliamFNF-PP1Start=2/7, B1=1000000000, B2=221000000000
2020-08-12_p95holder_C-PRPM1669/112493750443412941745410571996247741731544451845539488817 : 3470CACADAE4A903
2020-04-17Oliver KruseC-PRPM1669/112493750443412941745410571996247741731544451845539488817 : 3470CACADAE4A903
2017-12-07ATHC-PRPM1669/112493750443412941745410571996247741731544451845539488817 : A51A6C8166366312
2017-10-02kkmrkkblmbrbkC-PRPM1669/112493750443412941745410571996247741731544451845539488817 : A51A6C8166366312
2017-09-21Oliver KruseC-PRPM1669/known_factors : A51A6C8166366312
2009-07-26unconnectedF-ECMFactor: 112493750443412941745410571996247741731544451845539488817
2009-06-14James HintzNF-PM1B1=22000000000, B2=220000000000, E=12
2008-12-07Matthias WurtingerNF-PM1B1=20000000000, B2=40000000000, E=12
2008-12-06Matthias WurtingerNF-PM1B1=15000000000, B2=30000000000, E=12
2008-12-05Matthias WurtingerNF-PM1B1=10000000000, B2=20000000000, E=12
2005-04-02garyfuNFno factor TF: 1-59
2002-12-25-anonymous-NF-PM1B1=4290000000
2002-10-19Alex KruppaNFno factor TF: 1-57
2002-09-29Alex KruppaNFno factor TF: 1-57
2002-09-14-anonymous-NF-PM1B1=3221225472, B2=4290000000, E=48
2002-08-03-anonymous-NF-PM1B1=2147483648, B2=4290000000, E=48
2002-05-25-anonymous-NF-PM1B1=1073741824, B2=4290000000
2001-05-20-anonymous-NF-PM1B1=3000000000, B2=4290000000
2001-02-11-anonymous-NF-PM1B1=10000, B2=1000000
2001-02-11-anonymous-NF-PM1B1=1000000, B2=100000000
2000-07-17-anonymous-NFno factor TF: 1-56
2000-01-25-anonymous-NFno factor TF: 54-55
1998-08-24-anonymous-NFno factor TF: 50-53
1998-07-29-anonymous-NFno factor TF: 50-51