26 115 953 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 2⁷³

TF target 2⁷⁰

P-1

B1 =	310000
B2 =	7672500

Status	Date	User	Residue	Shift	Software
Verified	2005-02-02	Randi Andersen	F3B6845AA948C8E6	17071615	Windows,Prime95,v23,(aka WZ1)
Verified	2012-03-07	Dubslow	F3B6845AA948C8E6	8966477	Linux 64-bit,Prime95,v27.3,build 1
Verified	2012-05-21	-anonymous-	F3B6845AA948C8E6	14303760	Windows Service,Prime95,v26.6,build 3

History

Date	User	Type	Result
2021-01-02	-anonymous-	NF	no factor TF: 72-73
2020-10-31	megavink	NF	no factor TF: 71-72
2020-10-31	megavink	NF	no factor TF: 70-71
2017-04-02	ramgeis	NF	no factor TF: 69-70
2012-05-21	-anonymous-	C-LL	F3B6845AA948C8E6
2012-03-07	Dubslow	C-LL	F3B6845AA948C8E6
2011-12-27	hustensaft	NF	no factor TF: 68-69
2011-10-26	David Campeau	NF	no factor TF: 67-68
2005-02-02	voxra	C-LL	F3B6845AA948C8E6
2005-01-10	voxra	NF-PM1	B1=310000, B2=7672500
2004-07-26	-anonymous-	NF	no factor TF: 1-67