82 543 121 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Composite: proven not-prime with Lucas-Lehmer test

No factors below 2⁷⁶

TF target 2⁷⁵

P-1

B1 =	730000
B2 =	14600000

Status	Date	User	Residue	Shift	Software
Verified	2018-09-05	curtisc	865F41BBA8FB3AA6	19907013	Windows Service,Prime95,v28.7,build 1
Verified	2026-02-26	Greg	865F41BBA8FB3AA6	0	Linux64,prpll,v46386d0

History

Date	User	Type	Result
2026-02-26	Greg	C-LL	865F41BBA8FB3AA6
2025-08-26	ANONYMOUS	NF	no factor TF: 75-76
2018-09-05	curtisc	C-LL	865F41BBA8FB3AA6
2017-08-08	mansky	NF-PM1	B1=730000, B2=14600000
2016-12-13	AirSquirrels	NF	no factor TF: 74-75
2016-12-13	AirSquirrels	NF	no factor TF: 73-74
2016-11-13	Judge Hale	NF	no factor TF: 72-73
2016-11-13	Judge Hale	NF	no factor TF: 71-72
2013-12-16	Robish	NF	no factor TF: 70-71
2013-02-17	Eugene Thorne	NF	no factor TF: 69-70
2013-02-10	sasabl	NF	no factor TF: 68-69
2013-02-07	-anonymous-	NF	no factor TF: 67-68
2013-02-01	rjbelans	NF	no factor TF: 66-67
2011-03-21	ap501983	NF	no factor TF: 65-66
2010-12-10	Architects Cubed	NF	no factor TF: 64-65