49 458 037 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 2⁷⁵

TF target 2⁷³

P-1

B1 =	1000000
B2 =	20000000

Status	Date	User	Residue	Shift	Software
Bad	2011-07-11	raymondf	5C01F793C0C56A8E	21689982	Linux 64-bit,Prime95,v25.7,build 3
Verified	2015-12-07	Architects Cubed	FE6A9AF8C3DCCE12	13776565	Linux 64-bit,Prime95,v27.9,build 1
Verified	2016-09-09	endless_mike	FE6A9AF8C3DCCE12	43292746	Linux 64-bit,Prime95,v28.9,build 2

History

Date	User	Type	Result
2020-12-21	-anonymous-	NF	no factor TF: 74-75
2020-11-17	Sid & Andy	NF-PM1	B1=1000000, B2=20000000
2019-07-24	Jon Pace	NF	no factor TF: 73-74
2017-09-10	Sid & Andy	NF	no factor TF: 72-73
2016-09-09	endless_mike	C-LL	FE6A9AF8C3DCCE12
2015-12-07	Architects Cubed	C-LL	FE6A9AF8C3DCCE12
2015-08-17	AirSquirrels	NF	no factor TF: 71-72
2015-08-13	LaurV	NF	no factor TF: 70-71
2015-07-28	Gordon Spence	NF	no factor TF: 69-70
2011-07-11	raymondf	C-LL	5C01F793C0C56A8E
2011-03-15	raymondf	NF-PM1	B1=785000
2008-10-04	tryptamine dreamer	NF	no factor TF: 1-69
2008-06-03	-anonymous-	NF	no factor TF: 1-64
2007-05-28	1997rj7	NF	no factor TF: 1-63
2003-11-28	Team Prime Rib	NF	no factor TF: 1-59