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

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
198977Factored
FactorDigitsBitsDate
10696013876957535591959.92008-02-27 16:04:25
ECM
DigitsB1Curves
2550000280 / 280
30250000609 / 640
Estimated T-Level: 29.8 ⓘ
TF below 2^94 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Amdahl 6 - 1989344B2BAE0
Verified (Factored)Martin EiblAE7000F4B44B2BAE0
Verified (Factored)Brian J. BeesleyAE7000F4B44B2BAE0
Verified (Factored)Eivind TrielAE7000F4B44B2BAE15069
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-22Oliver KruseB4B69D4CD02EA76F1013
Verified2017-10-12kkmrkkblmbrbkB4B69D4CD02EA76F17749213
Verified2020-04-17Oliver KruseBB0A193E6AF6E2A9119063253
Verified2023-08-24USAFSSBB0A193E6AF6E2A913731553
History
DateUserTypeResult
2023-08-24curtiscCERT
PRP Certification
Proof certified good
2023-08-24USAFSSC-PRP
M198977/1069601387695753559 : BB0A193E6AF6E2A9
PRP proof power = 5
PRP: Verified
Proof certified good
2022-03-07LordJuliusNF
no factor from 2^54 to 2^55
2020-04-17Oliver KruseC-PRP
M198977/1069601387695753559 : BB0A193E6AF6E2A9
PRP: Verified
PRP without proof (small exponent)
2017-10-12kkmrkkblmbrbkC-PRP
M198977/1069601387695753559 : B4B69D4CD02EA76F
PRP: Verified
PRP without proof (small exponent)
2017-09-30kkmrkkblmbrbkNF-PM1
B1=100000000, B2=2000000000, E=12
2017-09-22Oliver KruseC-PRP
M198977/1069601387695753559 : B4B69D4CD02EA76F
PRP: Verified
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M198977/1069601387695753559 : B4B69D4CD02EA76F
PRP without proof (not generated)
2008-02-27Steve ScottF-ECM
Factor: 1069601387695753559