49 536 463 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 2⁷³

P-1

B1 =	575000
B2 =	14231250

Status	Date	User	Residue	Shift	Software
Bad	2010-05-19	David_Harvey	6725004C933D16A5	11556717	Windows,Prime95,v25.11,build 2
Verified	2015-10-06	George Woltman	6195F4F8B17FD8CF	24768944	CUDALucas v2.05 Beta
Verified	2016-09-08	MadPoo 🙂	6195F4F8B17FD8CF	35945302	Windows 64-bit,Prime95,v26,(aka We4)

History

Date	User	Type	Result
2024-08-16	tbusby	NF	no factor TF: 69-70
2019-07-06	-anonymous-	NF	no factor TF: 73-74
2017-09-11	Sid & Andy	NF	no factor TF: 72-73
2016-09-08	MadPoo 🙂	C-LL	6195F4F8B17FD8CF
2015-10-06	George Woltman	C-LL	6195F4F8B17FD8CF
2015-08-08	Mark Rose	NF	no factor TF: 71-72
2015-07-25	Mark Rose	NF	no factor TF: 70-71
2015-07-23	Architects Cubed	NF	no factor TF: 69-70
2010-05-19	David_Harvey	C-LL	6725004C933D16A5
2010-04-08	David_Harvey	NF-PM1	B1=575000, B2=14231250
2008-09-23	S485122	NF	no factor TF: 64-65
2008-09-23	S485122	NF	no factor TF: 65-66
2008-09-23	S485122	NF	no factor TF: 67-68
2008-09-23	S485122	NF	no factor TF: 63-64
2008-09-23	S485122	NF	no factor TF: 66-67
2008-09-23	S485122	NF	no factor TF: 68-69
2007-07-04	1997rj7	NF	no factor TF: 1-63
2003-12-13	Team Prime Rib	NF	no factor TF: 1-59
2000-10-15	Joss	NF	no factor TF: 1-58