85 407 431 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Tested as composite (unverified): unconfirmed Lucas-Lehmer test says not-prime

No factors below 2⁷⁶

TF target 2⁷⁵

P-1

B1 =	402000
B2 =	61745250

Status	Date	User	Residue	Shift	Software
Unverified	2018-10-17	BFN	0D38AE92394BF9__	13573754	Windows 64-bit,Prime95,v27.9,build 1

History

Date	User	Type	Result
2023-03-09	Mark Rose	NF-PM1	B1=402000, B2=61745250
2018-10-17	BFN	C-LL	0D38AE92394BF9__
2018-01-25	Yxinity	NF-PM1	B1=780000
2017-08-28	One Man	NF	no factor TF: 75-76
2017-08-25	1997rj7	NF	no factor TF: 74-75
2017-03-03	-anonymous-	NF	no factor TF: 71-72
2017-03-03	-anonymous-	NF	no factor TF: 72-73
2017-03-03	-anonymous-	NF	no factor TF: 73-74
2015-08-16	monst	NF	no factor TF: 70-71
2013-08-18	Robish	NF	no factor TF: 69-70
2013-08-16	Robish	NF	no factor TF: 68-69
2013-08-16	Robish	NF	no factor TF: 67-68
2013-06-17	Lukin Dmitry	NF	no factor TF: 66-67
2013-04-27	c10ck3r	NF	no factor TF: 65-66
2010-11-26	Architects Cubed	NF	no factor TF: 64-65