50 015 437 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 =	560000
B2 =	14560000

Status	Date	User	Residue	Shift	Software
Bad	2010-07-30	Lelikoid	2BC5F72A1CCFE9AC	3264703	Windows 64-bit,Prime95,v25.8,build 4
Verified	2016-02-11	Tom Womack	2479B353AC1FA719	42427186	Linux 64-bit,Prime95,v28.7,build 1
Verified	2016-09-19	ATH	2479B353AC1FA719	25022421	CUDALucas v2.05.1

History

Date	User	Type	Result
2017-02-18	Bruno Victal	NF	no factor TF: 74-75
2016-09-19	ATH	C-LL	2479B353AC1FA719
2016-09-01	NoPolarBearsHere	NF	no factor TF: 73-74
2016-02-11	Tom Womack	C-LL	2479B353AC1FA719
2015-10-29	Greg	NF	no factor TF: 72-73
2015-10-29	1997rj7	NF	no factor TF: 71-72
2015-10-24	XZT	NF	no factor TF: 70-71
2010-07-30	Lelikoid	C-LL	2BC5F72A1CCFE9AC
2010-06-07	Lelikoid	NF-PM1	B1=560000, B2=14560000
2008-11-18	ITS	NF	no factor TF: 1-70
2008-10-26	ITS	NF	no factor TF: 1-70
2008-07-28	-anonymous-	NF	no factor TF: 1-64
2000-03-15	-anonymous-	NF	no factor TF: 1-60
2000-02-09	-anonymous-	NF	no factor TF: 1-54
1999-12-30	-anonymous-	NF	no factor TF: 1-53
1999-10-07	-anonymous-	NF	no factor TF: 1-53