80 563 501 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 =	665000
B2 =	11637500

Status	Date	User	Residue	Shift	Software
Verified	2017-04-22	ATH	566277791585AB2B	79074491	Linux 64-bit,Prime95,v29.1,build 15
Verified	2017-04-22	MadPoo 🙂	566277791585AB2B	46420034	Windows 64-bit,Prime95,v26,(aka We4)

History

Date	User	Type	Result
2025-09-25	Kyle Askine	NF	no factor TF: 75-76
2017-04-22	MadPoo 🙂	C-LL	566277791585AB2B
2017-04-22	ATH	C-LL	566277791585AB2B
2017-02-05	karjalanpiirakka	NF-PM1	B1=665000, B2=11637500
2016-10-24	AirSquirrels	NF	no factor TF: 74-75
2016-10-24	AirSquirrels	NF	no factor TF: 73-74
2016-05-17	Judge Hale	NF	no factor TF: 72-73
2016-05-17	Judge Hale	NF	no factor TF: 71-72
2013-06-15	tsc	NF	no factor TF: 1-71
2011-02-11	Mclighter	NF	no factor TF: 69-70
2011-02-07	Fred Cirera	NF	no factor TF: 68-69
2011-02-02	Jaeckel	NF	no factor TF: 67-68
2011-01-30	dsl	NF	no factor TF: 66-67
2011-01-29	ITS	NF	no factor TF: 65-66
2010-11-28	Architects Cubed	NF	no factor TF: 64-65