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
19571Factored
FactorDigitsBitsDate
63537251511032.6old
28442722573031341.42008-08-26 19:58:56
4469361640972905061610554486246639052938125.12017-10-03 07:53:06
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001566 / 1566
4030000001430 / 4588
Estimated T-Level: 36.6
TF below 2^116 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-09-21Oliver KruseF482FB016917FDBD2013
Verified2017-10-04James HeinrichE4F49064A90F96FF3013
Verified2017-10-09Chang Chia-TcheE4F49064A90F96FF3013
Verified2017-10-13Oliver KruseE4F49064A90F96FF3670613
Unverified2020-04-17Oliver KruseA6743779B5D68F__3324253
History
DateUserTypeResult
2023-05-14JacobZNF-PM1
B1=5300000000, B2=15580930497522390
2022-02-06Lisander ViaeneNF-PM1
B1=50000
2020-04-17Oliver KruseC-PRP
M19571/6353725151/2844272257303/44693616409729050616105544862466390529 : A6743779B5D68F__
PRP without proof (small exponent)
2017-10-13Oliver KruseC-PRP
M19571/6353725151/2844272257303/44693616409729050616105544862466390529 : E4F49064A90F96FF
PRP without proof (small exponent)
2017-10-09Chang Chia-TcheC-PRP
M19571/known_factors : E4F49064A90F96FF
PRP without proof (not generated)
2017-10-04James HeinrichC-PRP
M19571/6353725151/2844272257303/44693616409729050616105544862466390529 : E4F49064A90F96FF
PRP without proof (not generated)
2017-10-03Oliver KruseC-PRP
M19571/6353725151/2844272257303/44693616409729050616105544862466390529 : E4F49064A90F96FF
PRP without proof (not generated)
2017-10-03kkmrkkblmbrbkF-ECM
Factor: 44693616409729050616105544862466390529 / (ECM curve 644, B1=1000000, B2=100000000)
2017-09-21Oliver KruseC-PRP
M19571/6353725151/2844272257303 : F482FB016917FDBD
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M19571/6353725151/2844272257303 : F482FB016917FDBD
PRP without proof (not generated)
2008-08-26-Anonymous-F
Factor: 2844272257303