81 893 677 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

Composite: proven not-prime with Lucas-Lehmer test

TF

No factors below 2⁷⁵

TF target 2⁷⁵

P-1

B1 =	695000
B2 =	14247500

Status	Date	User	Residue	Shift
Verified	2017-10-20	Vasily Voronin	DC521FC1AC9AC63B	46349286
Verified	2024-11-06	Dan Whitley	DC521FC1AC9AC63B	66900472

History

Date	User	Type	Result
2024-11-06	Dan Whitley	C-LL	DC521FC1AC9AC63B
2017-10-20	Vasily Voronin	C-LL	DC521FC1AC9AC63B
2016-10-23	TheJudger	NF-PM1	B1=695000, B2=14247500, E=12
2016-09-19	Mark Rose	NF	no factor from 2^74 to 2^75
2016-09-19	Mark Rose	NF	no factor from 2^73 to 2^74
2016-07-18	Bdot	NF	no factor from 2^72 to 2^73
2016-07-18	Bdot	NF	no factor from 2^71 to 2^72
2011-03-06	Ungelovende	NF	no factor from 2^70 to 2^71
2011-03-06	Ungelovende	NF	no factor from 2^69 to 2^70
2011-03-06	Ungelovende	NF	no factor from 2^68 to 2^69
2011-03-06	Ungelovende	NF	no factor from 2^67 to 2^68
2011-03-06	Ungelovende	NF	no factor from 2^65 to 2^67
2010-12-16	Architects Cubed	NF	no factor from 2^64 to 2^65