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
561091Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 268
TF target 244
TF below 2^97 is very unlikely to find new factors due to ECM effort.
P-1
B1 = 70000000
B2 = 3515943120690
ECM
DigitsB1Curves
2550000280 / 280
30250000640 / 640
351000000191 / 1566
Estimated T-Level: 30.6
LL
StatusDateUserResidueShift
VerifiedDavid Slowinski3ACB0
VerifiedClaude BarbeD1A15C980FD5BACB0
Verified2002-06-23Dennis PopeD1A15C980FD5BACB332117
Verified2015-04-11MadPooD1A15C980FD5BACB108218
History
DateUserTypeResult
2023-10-23linamentNF-PM1
B1=70000000, B2=3515943120690
2023-10-19linamentNF-PM1
B1=70000000
2023-07-19JossNF-PM1
B1=2995136, B2=44909264400
2023-03-16JossNF-PM1
B1=1000000, B2=20184814650
2022-12-11masserNF-PP1
Start=2/7, B1=16000000, B2=496000000
2022-12-08masserNF-PP1
Start=6/5, B1=8000000, B2=216000000
2022-12-04masserNF-PP1
Start=105/43, B1=4000000, B2=164000000
2022-11-22JossNF-PM1
B1=2995136, B2=6914150100
2022-04-25Gordon SpenceNF
no factor from 2^67 to 2^68
2022-03-07LordJuliusNF
no factor from 2^54 to 2^55
2020-08-05YxinityNF
no factor from 2^66 to 2^67
2019-04-09alexNF-PM1
B1=10000000, B2=400000000, E=12
2018-06-04chuenkitNF
no factor from 2^65 to 2^66
2017-11-24BloodERazorNF
no factor from 2^64 to 2^65
2016-02-23Mark RoseNF
no factor from 2^58 to 2^60
2016-02-23Mark RoseNF
no factor from 2^60 to 2^61
2015-11-07Sid & AndyNF-PM1
B1=5610910, B2=168327300, E=12
2015-10-21Bruno VictalNF-PM1
B1=1600000, B2=66000000, E=12
2015-09-13Gordon SpenceNF
no factor from 2^63 to 2^64
2015-09-13Gordon SpenceNF
no factor from 2^62 to 2^63
2015-07-10NRNF
no factor from 2^61 to 2^62
2015-04-11MadPooC-LL
D1A15C980FD5BACB
2013-10-11David CampeauNF-PM1
B1=1355000, B2=36585000, E=12
2012-07-14JossNF-PM1
B1=1122182
2012-03-05JossNF-PM1
B1=878503
2011-08-20JossNF-PM1
B1=702802
2011-06-26JossNF-PM1
B1=421681