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:










MnStatusDetails
19387Composite, with 3 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
1080102890391236.7old
6176018879531239.22008-08-26 19:58:56
175966061749500528799563618168370868107730343140.32023-04-19 11:41:44
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000002554 / 4588
Estimated T-Level: 37.8
TF below 2^121 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-09-21Oliver Kruse56D64A789EF814282013
Verified (Factored)2017-10-12kkmrkkblmbrbk56D64A789EF814282744013
Verified (Factored)2020-04-17Oliver KruseDB8C8FEC79DE8D8521392153
Verified2023-04-19JacobZDB8C8FEC79DE8D853852253
P-1 factors
DateFactorB1B2
2023-04-191759660617495005287995636181683708681077303540000000015129309322837710
History
DateUserTypeResult
2024-12-29masserNF-PP1
Start=102/31, B1=132000000, B2=131868000000
2024-12-23masserNF-PP1
Start=6/5, B1=132000000, B2=131868000000
2024-12-21masserNF-PP1
Start=2/7, B1=132000000, B2=131868000000
2023-04-19JacobZC-PRP
M19387/108010289039/617601887953/1759660617495005287995636181683708681077303 : DB8C8FEC79DE8D85
PRP: Verified
PRP without proof (small exponent)
2023-04-19JacobZF-PM1
Factor: 1759660617495005287995636181683708681077303 / (P-1, B1=5400000000, B2=15129309322837710)
2022-02-06Lisander ViaeneNF-PM1
B1=50000
2020-04-17Oliver KruseC-PRP
M19387/108010289039/617601887953 : DB8C8FEC79DE8D85
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M19387/108010289039/617601887953 : 56D64A789EF81428
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M19387/108010289039/617601887953 : 56D64A789EF81428
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M19387/108010289039/617601887953 : 56D64A789EF81428
PRP without proof (not generated)
2008-08-26-Anonymous-F
Factor: 617601887953