48 601 447 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 2⁷²

P-1

B1 =	800000
B2 =	16000000

Status	Date	User	Residue	Shift	Software
Bad	2010-02-08	-anonymous-	84125391B3872AAF	27312083	Windows,Prime95,v25.11,build 2
Verified	2017-01-14	Tom Womack	AFEBCD1336504BA9	45158694	Linux 64-bit,Prime95,v28.10,build 1
Verified	2017-01-19	ATH	AFEBCD1336504BA9	3545	CUDALucas v2.05.1

History

Date	User	Type	Result
2018-10-19	Sid & Andy	NF-PM1	B1=800000, B2=16000000, E=6
2017-08-27	Sid & Andy	NF	no factor TF: 72-73
2017-01-19	ATH	C-LL	AFEBCD1336504BA9
2017-01-14	Tom Womack	C-LL	AFEBCD1336504BA9
2015-12-21	AirSquirrels	NF	no factor TF: 71-72
2015-12-21	AirSquirrels	NF	no factor TF: 70-71
2010-02-08	-anonymous-	C-LL	84125391B3872AAF
2009-12-11	-anonymous-	NF-PM1	B1=690000
2008-06-02	Team_Deutschland	NF	no factor TF: 1-70
2008-01-15	1997rj7	NF	no factor TF: 1-63
2003-06-06	Thomas Mullen	NF	no factor TF: 1-59