25 852 649 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 =	980000
B2 =	56613000

Status	Date	User	Residue	Shift	Software
Bad	2005-06-19	Rob Sartain	194621D650C8D751	2145216	Windows,Prime95,v23,(aka WZ1)
Verified	2010-11-04	MAURICEBETA	E541F61F802E2F65	4861180	Windows,Prime95,v25.11,build 2
Verified	2012-05-23	Dubslow	E541F61F802E2F65	0	CUDALucas v2.00a
Verified	2012-06-15	lexatref	E541F61F802E2F65	23494170	Windows,Prime95,v25.9,build 4

History

Date	User	Type	Result
2021-09-05	Architects Cubed	NF-PM1	B1=980000, B2=56613000
2021-08-26	TheJudger	NF	no factor TF: 72-73
2021-08-26	TheJudger	NF	no factor TF: 71-72
2021-07-15	mikr	NF	no factor TF: 70-71
2017-03-28	ramgeis	NF	no factor TF: 69-70
2012-06-15	lexatref	C-LL	E541F61F802E2F65
2012-05-23	Dubslow	C-LL	E541F61F802E2F65
2011-12-18	bcp19	NF	no factor TF: 68-69
2011-10-14	Dubslow	NF	no factor TF: 67-68
2010-11-04	MAURICEBETA	C-LL	E541F61F802E2F65
2005-06-19	Rob Sartain	C-LL	194621D650C8D751
2005-05-28	Rob Sartain	NF-PM1	B1=385000
2004-06-21	-anonymous-	NF	no factor TF: 1-67
2004-04-29	1997rj7	NF	no factor TF: 1-62
2001-08-12	Net_Force	NF	no factor TF: 1-56