Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

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Exponent Range:










MnStatusDetails
17627Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
384867919928.5old
50160166254572514864607044412892.02008-10-16 23:57:27
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000002542 / 4588
Estimated T-Level: 37.8
TF below 2^120 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-21Oliver Kruse7DCC6C2DAE8607ED2013
Verified2017-10-12kkmrkkblmbrbk7DCC6C2DAE8607ED2967313
Verified2020-04-17Oliver Kruse73CFF1C5C511295E26753
Verified2024-07-01kkmrkkblmbrbk73CFF1C5C511295E2418153
History
DateUserTypeResult
2025-01-08masserNF-PP1
Start=6/5, B1=132000000, B2=131868000000
2024-12-29masserNF-PP1
Start=188/17, B1=132000000, B2=131868000000
2024-12-17masserNF-PP1
Start=2/7, B1=132000000, B2=131868000000
2024-07-01kkmrkkblmbrbkC-PRP
M17627/384867919/5016016625457251486460704441 : 73CFF1C5C511295E
PRP: Verified
PRP without proof (small exponent)
2023-04-12JacobZNF-PM1
B1=6000000000, B2=17613225783603450
2022-02-06Lisander ViaeneNF-PM1
B1=50000
2020-04-17Oliver KruseC-PRP
M17627/384867919/5016016625457251486460704441 : 73CFF1C5C511295E
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M17627/384867919/5016016625457251486460704441 : 7DCC6C2DAE8607ED
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M17627/384867919/5016016625457251486460704441 : 7DCC6C2DAE8607ED
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M17627/384867919/5016016625457251486460704441 : 7DCC6C2DAE8607ED
PRP: Verified
PRP without proof (not generated)
2008-10-16-Anonymous-F-ECM
Factor: 5016016625457251486460704441