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
49683521Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 276
TF target 273
P-1
B1 = 2000000
B2 = 70000000
ECM
DigitsB1Curves
255000011 / 280
Estimated T-Level: 20.2 ⓘ
LL
StatusDateUserResidueShift
Verified2012-09-12smd7779F0598519015186115849374
Verified2019-08-30Sergey Nosov9F059851901518614070017
History
DateUserTypeResult
2021-05-16Anton RepkoNF
no factor from 2^74 to 2^76
2021-05-11Anton RepkoNF-PM1
B1=2000000, B2=70000000
2021-05-09Anton RepkoNF-PP1
Start=2/7, B1=700000, B2=32900000
2019-08-30Sergey NosovC-LL
9F05985190151861
2019-01-06-Anonymous-NF
no factor from 2^73 to 2^74
2018-01-24Mark RoseNF
no factor from 2^72 to 2^73
2012-09-12smd777C-LL
9F05985190151861
2012-02-01GregNF
no factor from 2^71 to 2^72
2012-02-01GregNF
no factor from 2^70 to 2^71
2012-01-27Jerry HallettNF
no factor from 2^69 to 2^70
2011-08-03Fan AndongNF-PM1
B1=575000, B2=14662500, E=6