45 231 161 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 2⁷⁴

TF target 2⁷²

P-1

B1 =	540000
B2 =	13500000

Status	Date	User	Residue	Shift	Software
Verified	2012-01-24	Dubslow	8963C8737794985C	12221326	Linux 64-bit,Prime95,v26.6,build 3
Verified	2016-03-31	ciuse	8963C8737794985C	1309785	Windows 64-bit,Prime95,v28.7,build 1

History

Date	User	Type	Result
2019-05-13	Sid & Andy	NF	no factor TF: 73-74
2018-08-17	Random GPUs	NF	no factor TF: 72-73
2016-03-31	ciuse	C-LL	8963C8737794985C
2012-01-24	Dubslow	C-LL	8963C8737794985C
2011-12-13	Craig Meyers	NF	no factor TF: 71-72
2011-12-05	Aaron Haviland	NF	no factor TF: 70-71
2011-12-05	Aaron Haviland	NF	no factor TF: 69-70
2011-11-30	lalera	NF	no factor TF: 68-69
2011-08-20	joe b.	NF-PM1	B1=540000, B2=13500000
2008-03-03	-anonymous-	NF	no factor TF: 1-68
2007-04-23	1997rj7	NF	no factor TF: 1-63