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
3972601Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 271
TF target 265
TF below 2^77 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 10273990
B2 = 20376886530
ECM
DigitsB1Curves
2550000266 / 280
Estimated T-Level: 24.8 ⓘ
LL
StatusDateUserResidueShift
Verified1998-10-18Quazi Nasiruddin Ahmed8F8C5226B001FB0F0
Bad1999-10-21James AldayCAF22A8111A1FEDB1903323
Verified2000-01-19Matti Kinnunen8F8C5226B001FB0F3357599
History
DateUserTypeResult
2025-02-20JossNF-PM1
B1=10273990, B2=20376886530
2025-02-19JossNF-PM1
B1=10273990, B2=10206085890
2023-07-03Sid & AndyNF-PM1
B1=5100000, B2=15749383650
2022-10-14JossNF-PM1
B1=1000000, B2=1017901500
2022-09-29JossNF-PM1
B1=1000000, B2=113097600
2022-05-12JossNF-PM1
B1=500000, B2=113097600
2021-06-03-Anonymous-NF
no factor from 2^70 to 2^71
2021-05-11axnNF
no factor from 2^69 to 2^70
2020-05-29TJAOINF
no factor from 2^68 to 2^69
2018-12-29YxinityNF
no factor from 2^67 to 2^68
2016-12-15Gordon SpenceNF
no factor from 2^66 to 2^67
2016-02-23Mark RoseNF
no factor from 2^62 to 2^63
2016-02-04ramgeisNF
no factor from 2^65 to 2^66
2013-10-19David CampeauNF
no factor from 2^64 to 2^65
2013-07-01JayderNF
no factor from 2^63 to 2^64
2012-02-20GrunwalderGIMPNF
no factor from 2^1 to 2^63
2011-04-25markrNF
no factor from 2^61 to 2^62
2011-04-24Carsten KossendeyNF-PM1
B1=265000, B2=7618750, E=12
2009-07-27Carsten KossendeyNF-PM1
B1=20000, B2=285000