85 091 819 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 =	13430000

Status	Date	User	Residue	Shift	Software
Verified	2019-07-15	WR	82BC38E3B6E328F7	56286185	Linux 64-bit,Prime95,v29.8,build 3
Verified	2026-02-17	fre_games	82BC38E3B6E328F7	63875853	Linux 64-bit,Prime95,v30.19,build 20

History

Date	User	Type	Result
2026-02-17	fre_games	C-LL	82BC38E3B6E328F7
2019-07-15	WR	C-LL	82BC38E3B6E328F7
2019-04-28	ATH	NF	no factor TF: 1-63
2019-04-28	ATH	NF	no factor TF: 63-64
2017-12-22	Oliver Kruse	NF-PM1	B1=680000, B2=13430000, E=12
2017-07-30	TheJudger	NF	no factor TF: 74-75
2017-07-30	TheJudger	NF	no factor TF: 75-76
2017-03-03	-anonymous-	NF	no factor TF: 72-73
2017-03-03	-anonymous-	NF	no factor TF: 73-74
2017-03-03	-anonymous-	NF	no factor TF: 71-72
2013-07-16	PascalBieri	NF	no factor TF: 70-71
2013-06-20	SMoffat	NF	no factor TF: 69-70
2013-06-18	SMoffat	NF	no factor TF: 68-69
2013-06-16	SMoffat	NF	no factor TF: 67-68
2013-02-24	Freaks32	NF	no factor TF: 66-67
2013-01-28	E.Lechner	NF	no factor TF: 65-66
2010-11-24	Architects Cubed	NF	no factor TF: 64-65