80 846 581 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 =	680000
B2 =	13770000

Status	Date	User	Residue	Shift	Software
Verified	2018-08-06	curtisc	51BD84D88AF29A7A	25565822	Windows Service,Prime95,v28.7,build 1
Verified	2026-01-18	Stephan Grupp	51BD84D88AF29A7A	46132517	Windows 64-bit,Prime95,v29.4,build 8

History

Date	User	Type	Result
2026-01-18	Stephan Grupp	C-LL	51BD84D88AF29A7A
2025-09-29	ElectricBill	NF	no factor TF: 75-76
2018-08-06	curtisc	C-LL	51BD84D88AF29A7A
2017-03-15	bam	NF-PM1	B1=680000, B2=13770000
2016-08-31	-anonymous-	NF	no factor TF: 74-75
2016-08-31	-anonymous-	NF	no factor TF: 73-74
2016-08-31	-anonymous-	NF	no factor TF: 72-73
2016-08-31	-anonymous-	NF	no factor TF: 71-72
2013-06-08	Houd Al-Obaidli	NF	no factor TF: 70-71
2013-02-01	rjbelans	NF	no factor TF: 69-70
2013-01-29	rjbelans	NF	no factor TF: 68-69
2013-01-26	phoenicis	NF	no factor TF: 67-68
2011-02-12	-anonymous-	NF	no factor TF: 66-67
2011-02-05	firejuggler	NF	no factor TF: 65-66
2010-12-11	Architects Cubed	NF	no factor TF: 64-65