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
156241Factored
FactorDigitsBitsDate
3722139676579528732955147992788.32009-01-11 14:07:20
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000172 / 1566
Estimated T-Level: 30.5 ⓘ
TF below 2^96 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Gary Gostin42070
Verified (Factored)Amdahl 6 - 1989322342070
Verified (Factored)George Johnston9D2D8F5FF22342070
Verified (Factored)Brian J. Beesley9D2D8F5FF22342070
Verified (Factored)Eivind Triel9D2D8F5FF223420755878
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-09-22Oliver Kruse6F2C699845CEA2D01013
Verified2017-10-11kkmrkkblmbrbk6F2C699845CEA2D0112514813
Verified2020-04-17Oliver Kruse57ED0F8876597DFD11133153
Verified2024-02-03Wentao Huang57ED0F8876597DFD18505353
History
DateUserTypeResult
2024-02-03curtiscCERT
PRP Certification
Proof certified good
2024-02-03Wentao HuangC-PRP
M156241/372213967657952873295514799 : 57ED0F8876597DFD
PRP proof power = 5
PRP: Verified
Proof certified good
2022-03-07LordJuliusNF
no factor from 2^57 to 2^58
2022-03-07LordJuliusNF
no factor from 2^54 to 2^55
2020-04-17Oliver KruseC-PRP
M156241/372213967657952873295514799 : 57ED0F8876597DFD
PRP: Verified
PRP without proof (small exponent)
2017-10-11kkmrkkblmbrbkC-PRP
M156241/372213967657952873295514799 : 6F2C699845CEA2D0
PRP: Verified
PRP without proof (small exponent)
2017-09-22Oliver KruseC-PRP
M156241/372213967657952873295514799 : 6F2C699845CEA2D0
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M156241/372213967657952873295514799 : 6F2C699845CEA2D0
PRP without proof (not generated)
2016-12-16kkmrkkblmbrbkNF-PM1
B1=100000000, B2=2000000000, E=12
2009-01-11axnF-ECM
Factor: 372213967657952873295514799
2008-12-31Sturle SundeNF
no factor from 2^58 to 2^59