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

PrimeNet Exponent Status

Exponent Range:










MnStatusDetails
73204409Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 275
TF target 274
P-1
B1 = 630000
B2 = 12757500
LL
StatusDateUserResidueShift
Verified2015-12-19volovik7EC6E75590BD871E9013351
Verified2016-01-23curtisc7EC6E75590BD871E6904400
History
DateUserTypeResult
2016-01-23curtiscC-LL
7EC6E75590BD871E
2015-12-19volovikC-LL
7EC6E75590BD871E
2015-08-07FilenNF-PM1
B1=630000, B2=12757500, E=12
2015-07-31NickOfTimeNF
no factor from 2^74 to 2^75
2015-07-31NickOfTimeNF
no factor from 2^73 to 2^74
2015-07-31NickOfTimeNF
no factor from 2^72 to 2^73
2012-10-07SWL551NF
no factor from 2^71 to 2^72
2012-10-07SWL551NF
no factor from 2^70 to 2^71
2012-10-07SWL551NF
no factor from 2^69 to 2^70
2010-10-12MarzbugNF
no factor from 2^68 to 2^69
2010-08-07LanceNF
no factor from 2^67 to 2^68
2010-06-07GrunwalderGIMPNF
no factor from 2^66 to 2^67
2010-06-06arnaudNF
no factor from 2^65 to 2^66
2010-06-02tmorrowNF
no factor from 2^64 to 2^65
2008-06-28George WoltmanNF
no factor to 2^64