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

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Exponent Range:










MnStatusDetails
15921047Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 274
TF target 269
P-1
B1 = 4112000
B2 = 18145447320
ECM
DigitsB1Curves
25500001 / 280
Estimated T-Level: 20.0 ⓘ
LL
StatusDateUserResidueShift
Verified2002-10-07GraveA5FB27811A233F2C14575192
Verified2006-03-01Robert TjiaA5FB27811A233F2C8846235
History
DateUserTypeResult
2025-01-10Jason LynchNF-PM1
B1=4112000, B2=18145447320
2022-02-17-Anonymous-NF
no factor from 2^73 to 2^74
2022-02-17-Anonymous-NF
no factor from 2^72 to 2^73
2021-09-19-Anonymous-NF
no factor from 2^71 to 2^72
2021-09-03lycornNF
no factor from 2^70 to 2^71
2021-05-11lycornNF
no factor from 2^69 to 2^70
2020-12-24ThaNF-PM1
B1=1500000, B2=30000000, E=12
2018-02-11ramgeisNF
no factor from 2^68 to 2^69
2018-02-11ramgeisNF
no factor from 2^67 to 2^68
2016-03-16Mark RoseNF
no factor from 2^65 to 2^66
2014-07-29NesowaNF
no factor from 2^66 to 2^67