Marin Mersenne 2^P-1
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Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
128437Factored
FactorDigitsBitsDate
12066291949159625271960.12007-10-03 17:56:05
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000211 / 1566
Estimated T-Level: 30.7 ⓘ
TF below 2^97 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-22Oliver Kruse9AC686998206F6951013
Verified2017-10-13kkmrkkblmbrbk9AC686998206F695110126913
Verified2020-04-17Oliver KruseD626DC30198C3BF616742153
Verified2024-02-03Wentao HuangD626DC30198C3BF616774153
History
DateUserTypeResult
2024-02-03Naegi MakotoCERT
PRP Certification
Proof certified good
2024-02-03Wentao HuangC-PRP
M128437/1206629194915962527 : D626DC30198C3BF6
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
M128437/1206629194915962527 : D626DC30198C3BF6
PRP: Verified
PRP without proof (small exponent)
2017-10-13kkmrkkblmbrbkC-PRP
M128437/1206629194915962527 : 9AC686998206F695
PRP: Verified
PRP without proof (not generated)
2017-09-22Oliver KruseC-PRP
M128437/1206629194915962527 : 9AC686998206F695
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M128437/1206629194915962527 : 9AC686998206F695
PRP without proof (not generated)
2017-03-31kkmrkkblmbrbkNF-PM1
B1=100000000, B2=2000000000, E=12
2007-10-03Chad DavisF-ECM
Factor: 1206629194915962527