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

PrimeNet Exponent Status

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MnStatusDetails
9781853Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 272
TF target 268
P-1
B1 = 1000000
B2 = 4669105980
ECM
DigitsB1Curves
25500003 / 280
Estimated T-Level: 20.1 ⓘ
LL
StatusDateUserResidueShift
Verified2000-05-17Tim SmuckD22A95462377F0C22180448
Verified2003-09-14IWS TU-GrazD22A95462377F0C24272378
History
DateUserTypeResult
2022-01-09LuminescenceNF-PM1
B1=1000000, B2=4669105980
2021-10-19SRBaseNF
no factor from 2^71 to 2^72
2021-09-07SRBaseNF
no factor from 2^70 to 2^71
2021-08-21SRBaseNF
no factor from 2^69 to 2^70
2019-09-06TJAOINF
no factor from 2^68 to 2^69
2016-11-11snme2pm1NF
no factor from 2^67 to 2^68
2016-11-11snme2pm1NF
no factor from 2^66 to 2^67
2015-04-27VictordeHollanderNF
no factor from 2^65 to 2^66
2013-08-25NesowaNF
no factor from 2^64 to 2^65
2013-03-20NesowaNF-PM1
B1=120000, B2=2370000, E=6