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

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MnStatusDetails
523877Composite, with 2 known prime factors. Cofactor is composite.
Factored
FactorDigitsBitsDate
42067323111032.0old
2493770784818583362501220412787.72016-03-24 20:26:01
ECM
DigitsB1Curves
2550000280 / 280
30250000218 / 640
Estimated T-Level: 26.7
TF below 2^84 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2017-09-27Oliver Kruse0026DDB5B63E35642013
Verified2017-11-03kkmrkkblmbrbk0026DDB5B63E3564211274013
Verified2020-04-19Oliver KruseD37381419945BE2A235103053
Verified2024-12-14kkmrkkblmbrbkD37381419945BE2A237816253
History
DateUserTypeResult
2024-12-14Taremimi7710CERT
PRP Certification
Proof certified good
2024-12-14kkmrkkblmbrbkC-PRP
M523877/4206732311/249377078481858336250122041 : D37381419945BE2A
PRP proof power = 6
PRP: Verified
Proof certified good
2021-06-06happy5214NF-PP1
Start=2/7, B1=5000000, B2=365000000
2021-06-06happy5214NF-PM1
B1=10000000, B2=830000000
2020-04-19Oliver KruseC-PRP
M523877/4206732311/249377078481858336250122041 : D37381419945BE2A
PRP: Verified
PRP without proof (small exponent)
2017-11-03kkmrkkblmbrbkC-PRP
M523877/4206732311/249377078481858336250122041 : 0026DDB5B63E3564
PRP: Verified
PRP without proof (small exponent)
2017-09-27Oliver KruseC-PRP
M523877/4206732311/249377078481858336250122041 : 0026DDB5B63E3564
PRP: Verified
PRP without proof (not generated)
2016-03-24TJAOIF-ECM
Factor: 249377078481858336250122041 / (ECM curve 51, B1=50000, B2=5000000)
2016-03-17alpertronNF-PM1
B1=1500000, B2=50000000, E=12