Marin Mersenne 2^P-1
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GIMPS
Finding World Record Primes Since 1996

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MnStatusDetails
1855463Factored
FactorDigitsBitsDate
26146706083387356793992271.12019-12-14 20:03:21
ECM
DigitsB1Curves
2550000280 / 280
30250000107 / 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)Don BelmontF8EFB8B139F0F8290
Verified (Factored)Tom CageF8EFB8B139F0F8290
Verified (Factored)1999-10-07Jeremy PharoahF8EFB8B139F0F829574800
Verified (Factored)2016-06-02MadPooF8EFB8B139F0F8291062195
PRP Cofactor
StatusDateUserResidueNumber of
known factors
ShiftTypeBase
Verified2019-12-15Niels_Mache_Nextcloud6D590B217A256A09115574653
Verified2019-12-15oodaira6D590B217A256A091144729153
History
DateUserTypeResult
2019-12-15oodairaC-PRP
M1855463/2614670608338735679399 : 6D590B217A256A09
PRP: Verified
PRP without proof (not generated)
2019-12-15Niels_Mache_NextcloudC-PRP
M1855463/2614670608338735679399 : 6D590B217A256A09
PRP: Verified
PRP without proof (not generated)
2019-12-14mnd9F-ECM
Factor: 2614670608338735679399 / (ECM curve 2, B1=50000, B2=5000000, Sigma=5928484154904357)
2019-06-03TJAOINF
no factor from 2^67 to 2^68
2018-10-25JossNF-PM1
B1=1855463, B2=204100930, E=12
2018-08-14JossNF-PM1
B1=1855463, B2=185546300, E=12
2018-06-11TJAOINF
no factor from 2^66 to 2^67
2016-06-02MadPooC-LL
F8EFB8B139F0F829
2016-02-23Mark RoseNF
no factor from 2^61 to 2^62
2016-02-23Mark RoseNF
no factor from 2^59 to 2^60
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2015-09-09ramgeisNF
no factor from 2^65 to 2^66
2015-07-23mikrNF-PM1
B1=2780000, B2=91760000, E=12
2015-05-06snme2pm1NF
no factor from 2^64 to 2^65
2015-05-06snme2pm1NF
no factor from 2^63 to 2^64
2014-09-19JossNF-PM1
B1=165664
2011-01-21GrunwalderGIMPNF
no factor from 2^1 to 2^63
2010-04-12Architects CubedNF
no factor from 2^60 to 2^61