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
4021Factored
FactorDigitsBitsDate
10800407823.4old
21925517722091341.0old
288935837429598526666048062367931101.2old
180597895287677844825883971022198334110.5old
87551917636053983989710023026011341333076282520498185724204504124966219.12021-05-19 19:16:34
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-09-21Oliver Kruse4F2A81DD755A7F0E4013
Verified (Factored)2017-10-02kkmrkkblmbrbk4F2A81DD755A7F0E4013
Verified (Factored)2017-12-07ATH4F2A81DD755A7F0E4253013
Verified (Factored)2020-04-17Oliver KruseC46519742CF0F34C4160153
Verified2021-05-20mnd9PRP_PRP_PRP_PRP_519313
Verified2021-05-21Chad Steenerson PRP_PRP_PRP_PRP_558213
History
DateUserTypeResult
2021-05-21Chad Steenerson P-PRP
M4021/10800407/2192551772209/2889358374295985266660480623679/1805978952876778448258839710221983/875519176360539839897100230260113413330762825204981857242045041249 is a probable prime.
2021-05-20mnd9P-PRP
M4021/10800407/2192551772209/2889358374295985266660480623679/1805978952876778448258839710221983/875519176360539839897100230260113413330762825204981857242045041249 is a probable prime.
2021-05-19Ryan PropperF-ECM
Factor: 875519176360539839897100230260113413330762825204981857242045041249 / (ECM curve 1, B1=850000000, B2=14182957708936, Sigma=17810609838895113476)
2020-04-17Oliver KruseC-PRP
M4021/10800407/2192551772209/2889358374295985266660480623679/1805978952876778448258839710221983 : C46519742CF0F34C
PRP: Verified
PRP without proof (small exponent)
2017-12-07ATHC-PRP
M4021/10800407/2192551772209/2889358374295985266660480623679/1805978952876778448258839710221983 : 4F2A81DD755A7F0E
PRP: Verified
PRP without proof (small exponent)
2017-10-02kkmrkkblmbrbkC-PRP
M4021/10800407/2192551772209/2889358374295985266660480623679/1805978952876778448258839710221983 : 4F2A81DD755A7F0E
PRP: Verified
PRP without proof (not generated)
2017-09-21Oliver KruseC-PRP
M4021/known_factors : 4F2A81DD755A7F0E
PRP without proof (not generated)