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
885803Factored
FactorDigitsBitsDate
1771607720.8old
23030879824.52008-07-16 09:28:17
69730412171032.72008-07-16 09:28:17
2612148293368971547.92014-03-21 11:37:59
111050804069845371753.32014-09-16 11:39:30
6609382878400770731859.22015-11-03 12:06:41
238988818922669013123372374.32016-02-12 13:34:38
59753162081101509323133832582.32016-11-25 11:25:34
891408901744419617858487746892996.22021-07-13 17:22:16
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001108 / 1566
Estimated T-Level: 33.5
TF below 2^106 is very unlikely to find new factors due to ECM effort.
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified (Factored)2017-10-05Oliver KruseC80546F8871CE3198013
Verified (Factored)2017-10-15kkmrkkblmbrbkC80546F8871CE31981247613
Verified (Factored)2020-04-22Oliver Kruse47395CC6A1BB3201853366953
Verified2021-07-13mikr47395CC6A1BB3201979950553
P-1 factors
DateFactorB1B2
2021-07-13891408901744419617858487746891000000000241000000000
History
DateUserTypeResult
2022-12-06LordJuliusNF
no factor from 2^67 to 2^68
2022-09-29LordJuliusNF
no factor from 2^66 to 2^67
2022-09-29LordJuliusNF
no factor from 2^65 to 2^66
2022-09-29LordJuliusNF
no factor from 2^64 to 2^65
2022-09-29LordJuliusNF
no factor from 2^63 to 2^64
2022-09-29LordJuliusNF
no factor from 2^62 to 2^63
2022-09-29LordJuliusNF
no factor from 2^61 to 2^62
2022-09-29LordJuliusNF
no factor from 2^60 to 2^61
2022-03-08LordJuliusNF
no factor from 2^54 to 2^59
2021-12-22Seth_TrNF-PM1
B1=1000000000, B2=1000750350600
2021-12-22Seth_TrNF-PM1
B1=1000000000
2021-10-16nordiNF-PP1
Start=6/5, B1=100000000, B2=10000000000
2021-10-05nordiNF-PP1
Start=2/7, B1=100000000, B2=10000000000
2021-07-13ALAN_BROWNCERT
PRP Certification
Proof certified good
2021-07-13mikrC-PRP
M885803/1771607/23030879/6973041217/261214829336897/11105080406984537/660938287840077073/23898881892266901312337/5975316208110150932313383/89140890174441961785848774689 : 47395CC6A1BB3201
PRP proof power = 6
PRP: Verified
Proof certified good
2021-07-13Seth_TrF-PM1
Factor: 89140890174441961785848774689 / (P-1, B1=1000000000, B2=241000000000)
2021-03-11Seth_TrNF-PM1
B1=50000000, B2=9050000000
2021-03-05Seth_TrNF-PM1
B1=26000000, B2=4186000000
2021-02-26Seth_TrNF-PM1
B1=20000000, B2=2000000000, E=12
2020-04-22Oliver KruseC-PRP
M885803/1771607/23030879/6973041217/261214829336897/11105080406984537/660938287840077073/23898881892266901312337/5975316208110150932313383 : 47395CC6A1BB3201
PRP: Verified (Factored)
PRP without proof (small exponent)
2017-10-15kkmrkkblmbrbkC-PRP
M885803/1771607/23030879/6973041217/261214829336897/11105080406984537/660938287840077073/23898881892266901312337/5975316208110150932313383 : C80546F8871CE319
PRP: Verified (Factored)
PRP without proof (small exponent)
2017-10-05Oliver KruseC-PRP
M885803/1771607/23030879/6973041217/261214829336897/11105080406984537/660938287840077073/23898881892266901312337/5975316208110150932313383 : C80546F8871CE319
PRP: Verified (Factored)
PRP without proof (not generated)
2017-09-28Oliver KruseC-PRP
M885803/1771607/23030879/6973041217/261214829336897/11105080406984537/660938287840077073/23898881892266901312337/5975316208110150932313383 : C80546F8871CE319
PRP without proof (not generated)
2016-11-25TJAOIF-ECM
Factor: 5975316208110150932313383 / (ECM curve 4, B1=50000, B2=5000000)
2016-03-17alpertronNF-PM1
B1=300000, B2=10000000, E=12
2016-02-12TJAOIF-ECM
Factor: 23898881892266901312337 / (ECM curve 57, B1=50000, B2=5000000)
2015-11-03TJAOIF
Factor: 660938287840077073 / TF: 59-60
2014-09-16TJAOIF
Factor: 11105080406984537 / TF: 53-54
2014-03-21TJAOIF
Factor: 261214829336897
2008-07-16J FeitsmaF
Factor: 6973041217
2008-07-16J FeitsmaF
Factor: 23030879