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
1897121Factored
FactorDigitsBitsDate
11382727823.4old
106238777926.72008-07-15 07:47:58
49742512631032.22008-07-15 07:47:58
283809301611134.72008-07-15 07:47:58
373960491531135.12008-07-15 07:47:58
366841734679611445.12014-01-14 11:47:12
28454735755384011651.32014-06-24 13:41:37
13197454178372174878072270.22020-09-07 08:58:51
1853109139457523979484412477.32021-08-18 19:36:00
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
3510000001033 / 1566
Estimated T-Level: 33.3
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 Kruse83517C25EF5D2DB17013
Verified (Factored)2017-11-11kkmrkkblmbrbk83517C25EF5D2DB17150652113
Verified (Factored)2020-09-07ATH4422A2AE3A1D4A8D8104913253
Verified2021-08-18SRJ28774422A2AE3A1D4A8D988475353
History
DateUserTypeResult
2022-11-24LordJuliusNF
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
2021-12-22Seth_TrNF-PM1
B1=200000000, B2=200880974580
2021-10-15nordiNF-PP1
Start=6/5, B1=40000000, B2=4000000000
2021-10-07nordiNF-PP1
Start=2/7, B1=50000000, B2=5000000000
2021-08-18yepengyuCERT
PRP Certification
Proof certified good
2021-08-18SRJ2877C-PRP
M1897121/11382727/106238777/4974251263/28380930161/37396049153/36684173467961/2845473575538401/1319745417837217487807/185310913945752397948441 : 4422A2AE3A1D4A8D
PRP proof power = 7
PRP: Verified
Proof certified good
2021-08-18nordiF-ECM
Factor: 185310913945752397948441 / (ECM curve 42, B1=50000, B2=6750000, Sigma=1985654427156550)
2021-04-05Seth_TrNF-PM1
B1=200000000, B2=40200000000
2020-09-07firejugglerCERT
PRP Certification
Proof certified good
2020-09-07ATHC-PRP
M1897121/11382727/106238777/28380930161/37396049153/4974251263/36684173467961/2845473575538401/1319745417837217487807 : 4422A2AE3A1D4A8D
PRP proof power = 7
PRP: Verified (Factored)
Proof certified good
2020-09-07_p95holder_F-ECM
Factor: 1319745417837217487807 / (ECM curve 5, B1=50000, B2=5000000)
2017-11-11kkmrkkblmbrbkC-PRP
M1897121/11382727/106238777/4974251263/28380930161/37396049153/36684173467961/2845473575538401 : 83517C25EF5D2DB1
PRP: Verified (Factored)
PRP without proof (not generated)
2017-10-05Oliver KruseC-PRP
M1897121/11382727/106238777/28380930161/37396049153/4974251263/36684173467961/2845473575538401 : 83517C25EF5D2DB1
PRP: Verified (Factored)
PRP without proof (not generated)
2017-10-04Oliver KruseC-PRP
M1897121/11382727/106238777/28380930161/37396049153/4974251263/36684173467961/2845473575538401 : 83517C25EF5D2DB1
PRP without proof (not generated)
2016-03-17alpertronNF-PM1
B1=30000000, B2=1000000000, E=12
2016-03-17alpertronNF-PM1
B1=100000000, B2=3000000000, E=12
2016-03-15James HeinrichNF-PM1
B1=10000000, B2=300000000, E=12
2014-06-24TJAOIF
Factor: 2845473575538401
2014-01-14TJAOIF
Factor: 36684173467961
2008-07-15J FeitsmaF
Factor: 4974251263
2008-07-15J FeitsmaF
Factor: 37396049153
2008-07-15J FeitsmaF
Factor: 28380930161
2008-07-15J FeitsmaF
Factor: 106238777