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
50747153Composite: proven not-prime with Lucas-Lehmer test
TF
No factors below 274
TF target 273
P-1
B1 = 610000
B2 = 20130000
LL
StatusDateUserResidueShift
Verified2011-08-18-Anonymous-428539ABDC528DB119098415
Verified2020-02-23RussEfarmer428539ABDC528DB18864907
History
DateUserTypeResult
2020-02-23RussEfarmerC-LL
428539ABDC528DB1
2019-06-02TheJudgerNF
no factor from 2^73 to 2^74
2015-12-30AirSquirrelsNF
no factor from 2^72 to 2^73
2015-12-04-Anonymous-NF
no factor from 2^71 to 2^72
2015-06-28Mark RoseNF
no factor from 2^70 to 2^71
2015-01-16monstNF
no factor from 2^69 to 2^70
2011-08-18-Anonymous-C-LL
428539ABDC528DB1
2009-01-19Sturle SundeNF
no factor from 2^68 to 2^69
2009-01-18HazmattomNF
no factor from 2^67 to 2^68
2009-01-01Sturle SundeNF-PM1
B1=610000, B2=20130000
2008-12-13tmorrowNF
no factor from 2^66 to 2^67
2008-12-09Sturle SundeNF
no factor from 2^65 to 2^66
2008-12-07Sturle SundeNF
no factor from 2^64 to 2^65
2008-09-19DerekNF
no factor to 2^64