26 379 497 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 2⁷⁰

P-1

B1 =	245000
B2 =	4532500

Status	Date	User	Residue	Shift	Software
Bad	2005-12-12	Dan Moore	B0CEDBA59F512815	12096941	Windows,Prime95,v24 final,(aka Wc1)
Verified	2011-06-11	RTHome	6CEDFF5E24A1ACEC	20281494	Windows,Prime95,v25.9,build 4
Bad	2012-05-01	BigBrother	6EB34DC60D0F38BD	22327762	Windows 64-bit,Prime95,v27.4,build 1
Verified	2012-07-10	Dubslow	6CEDFF5E24A1ACEC	14261927	Linux 64-bit,Prime95,v26,(aka We8)

History

Date	User	Type	Result
2021-09-13	TheJudger	NF	no factor TF: 73-74
2021-08-25	TheJudger	NF	no factor TF: 72-73
2019-07-27	James Heinrich	NF-PM1	B1=245000, B2=4532500, E=6
2012-07-18	Axelsson	NF	no factor TF: 71-72
2012-07-18	Axelsson	NF	no factor TF: 70-71
2012-07-18	Axelsson	NF	no factor TF: 69-70
2012-07-10	Dubslow	C-LL	6CEDFF5E24A1ACEC
2012-05-01	BigBrother	C-LL	6EB34DC60D0F38BD
2011-12-17	Roy Oswald	NF	no factor TF: 68-69
2011-10-12	David Campeau	NF	no factor TF: 67-68
2011-06-11	RTHome	C-LL	6CEDFF5E24A1ACEC
2005-12-12	AdvResSys Supercomputer	C-LL	B0CEDBA59F512815
2005-02-02	-anonymous-	NF-PM1	B1=405000
2004-08-06	-anonymous-	NF	no factor TF: 1-67
2004-06-12	1997rj7	NF	no factor TF: 1-62