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

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MnStatusDetails
4027Factored82185762602338638075357407556967313

1322603807888784213814883095222492416081030114751

55073558028420981931736977815277884416973711443146602259410542519
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2021-04-20XZT872B4531B1C5209A3188253
Verified (Factored)2021-04-19mnd9872B4531B1C5209A3344453
Verified (Factored)2020-10-02Lord Julius872B4531B1C5209A2221253
Verified (Factored)2020-10-01mnd9872B4531B1C5209A2318653
Verified (Factored)2020-04-17Oliver Kruse872B4531B1C5209A1188953
Verified (Factored)2017-10-12kkmrkkblmbrbkC88D2D68CF553369184213
Verified (Factored)2017-09-21Oliver KruseC88D2D68CF5533691013
Assigned
AssignedUserWork TypeStage% DoneUpdatedExpired
2017-10-09Chang Chia-TchePRP test0.0 % 2017-10-092017-10-12
History
DateUserTypeResult
2021-04-20XZTC-PRPM4027/82185762602338638075357407556967313/1322603807888784213814883095222492416081030114751/55073558028420981931736977815277884416973711443146602259410542519 : 872B4531B1C5209A
2021-04-19mnd9C-PRPM4027/82185762602338638075357407556967313/1322603807888784213814883095222492416081030114751/55073558028420981931736977815277884416973711443146602259410542519 : 872B4531B1C5209A
2021-04-19Ryan PropperF-ECMFactor: 55073558028420981931736977815277884416973711443146602259410542519 / (ECM curve 1, B1=260000000, B2=3039198402256, Sigma=2267136871149356697)
2020-10-02Lord JuliusC-PRPM4027/82185762602338638075357407556967313/1322603807888784213814883095222492416081030114751 : 872B4531B1C5209A
2020-10-01mnd9C-PRPM4027/82185762602338638075357407556967313/1322603807888784213814883095222492416081030114751 : 872B4531B1C5209A
2020-10-01Ryan PropperF-ECMFactor: 1322603807888784213814883095222492416081030114751 / (ECM curve 1, B1=110000000, B2=900514153782, Sigma=6082699471423120831)
2020-04-17Oliver KruseC-PRPM4027/82185762602338638075357407556967313 : 872B4531B1C5209A
2017-10-12kkmrkkblmbrbkC-PRPM4027/82185762602338638075357407556967313 : C88D2D68CF553369
2017-09-21Oliver KruseC-PRPM4027/82185762602338638075357407556967313 : C88D2D68CF553369
2017-09-21Oliver KruseC-PRPM4027/82185762602338638075357407556967313 : C88D2D68CF553369
2003-01-25-Anonymous-NFno factor to 2^57
2003-01-01-Anonymous-NF-PM1B1=4290000000
2002-09-22-Anonymous-NF-PM1B1=3221225472, B2=4290000000, E=48
2002-08-03-Anonymous-NF-PM1B1=2147483648, B2=4290000000, E=48
2002-06-02-Anonymous-NF-PM1B1=1073741824, B2=4290000000, E=48
2001-06-23-Anonymous-NF-PM1B1=3000000000, B2=4290000000
2001-06-09-Anonymous-NF-PM1B1=43000000, B2=4290000000
2001-02-11-Anonymous-NF-PM1B1=1000000, B2=100000000
2000-08-24-Anonymous-NFno factor to 2^56
2000-02-09-Anonymous-NFno factor from 2^54 to 2^55
1999-12-23-Anonymous-NFno factor from 2^53 to 2^54
1999-09-22-Anonymous-NFno factor from 2^52 to 2^53