Marin Mersenne 2^P-1
Username
Password
Forgot password?
White
Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
1992919Composite, with 1 known prime factor. Cofactor is composite.
Factored
FactorDigitsBitsDate
174002331228093550836072373.92016-04-05 03:53:52
ECM
DigitsB1Curves
2550000280 / 280
30250000106 / 640
Estimated T-Level: 25.8 ⓘ
TF below 2^81 is very unlikely to find new factors due to ECM effort.
LL
StatusDateUserResidueShift
Verified (Factored)Joel SmithDF8551BFC3C7D9400
Verified (Factored)1999-01-17Ken KieferDF8551BFC3C7D940112493
Verified (Factored)2015-07-12MadPooDF8551BFC3C7D9401510222
PRP
StatusDateUserResidueShiftTypeBase
Verified (Factored)2025-09-02Kriesel73EF1B31031A71ED013
PRP Cofactor
StatusDateUserResidueNumber of
known factors		ShiftTypeBase
Verified2017-10-05Oliver KruseE245C8F3C22B56F01013
Verified2017-11-12kkmrkkblmbrbkE245C8F3C22B56F01188788713
History
DateUserTypeResult
2025-09-03KrieselCERT
PRP Certification
CERT proof power = 6
Proof certified good
2025-09-02KrieselC-PRP
73EF1B31031A71ED
PRP proof power = 6
PRP: Verified (Factored)
Proof certified good
2017-11-12kkmrkkblmbrbkC-PRP
M1992919/17400233122809355083607 : E245C8F3C22B56F0
PRP: Verified
PRP without proof (not generated)
2017-10-05Oliver KruseC-PRP
M1992919/17400233122809355083607 : E245C8F3C22B56F0
PRP: Verified
PRP without proof (not generated)
2016-04-05bamF-ECM
Factor: 17400233122809355083607 / (ECM curve 1, B1=50000, B2=5000000)
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2015-10-23ramgeisNF
no factor from 2^70 to 2^71
2015-07-12MadPooC-LL
DF8551BFC3C7D940
2014-01-04Never Odd Or EvenNF
no factor from 2^69 to 2^70
2014-01-04Never Odd Or EvenNF
no factor from 2^68 to 2^69
2014-01-04Never Odd Or EvenNF
no factor from 2^67 to 2^68
2014-01-04Never Odd Or EvenNF
no factor from 2^66 to 2^67
2014-01-04Never Odd Or EvenNF
no factor from 2^65 to 2^66
2011-06-29kurlyNF-PM1
B1=1000000, B2=30000000, E=12
2011-05-03megavinkNF
no factor from 2^64 to 2^65
2011-05-03megavinkNF
no factor from 2^63 to 2^64
2011-05-03megavinkNF
no factor from 2^62 to 2^63
2011-05-03megavinkNF
no factor from 2^61 to 2^62
2009-12-09S485122NF
no factor from 2^60 to 2^61