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
12307213Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 273
TF target 268
P-1
B1 = 1000000
B2 = 2250268020
ECM
DigitsB1Curves
25500002 / 280
Estimated T-Level: 20.0 ⓘ
LL
StatusDateUserResidueShift
Verified2001-04-01W. Brisken / M. Nolta63E9EC59161AA9739017433
Verified2004-06-12Marc Getty / Phil Fizur63E9EC59161AA9739280129
History
DateUserTypeResult
2024-11-02Andrew BNF
no factor from 2^72 to 2^73
2021-12-13LuminescenceNF-PM1
B1=1000000, B2=2250268020
2021-10-23-Anonymous-NF
no factor from 2^71 to 2^72
2021-08-06ZacHFXNF
no factor from 2^70 to 2^71
2021-08-06ZacHFXNF
no factor from 2^69 to 2^70
2018-05-03riccardo ubertiNF-PM1
B1=430000, B2=8500000, E=12
2017-10-27ramgeisNF
no factor from 2^68 to 2^69
2015-07-27ThaNF
no factor from 2^67 to 2^68
2015-03-09ThaNF
no factor from 2^66 to 2^67
2013-09-18NesowaNF
no factor from 2^65 to 2^66
2013-07-31lycornNF
no factor from 2^64 to 2^65