48 704 479 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 =	585000
B2 =	17257500

Status	Date	User	Residue	Shift	Software
Bad	2011-07-11	Michael C	BF6AAE0E01BE7C76	0	CUDALucas v1.2
Bad	2017-08-10	-anonymous-	7FC5190538977648	28304222	Windows 64-bit,Prime95,v29.1,build 14
Verified	2017-08-12	MadPoo 🙂	DF765EEF31A3B59A	44668464	Windows 64-bit,Prime95,v26,(aka We4)
Verified	2017-08-20	kkmrkkblmbrbk	DF765EEF31A3B59A	9812259	Linux 64-bit,Prime95,v29.2,build 3

History

Date	User	Type	Result
2018-02-04	Architects Cubed	NF	no factor TF: 72-73
2017-08-20	kkmrkkblmbrbk	C-LL	DF765EEF31A3B59A
2017-08-12	MadPoo 🙂	C-LL	DF765EEF31A3B59A
2017-08-10	-anonymous-	C-LL	7FC5190538977648
2016-02-23	Mark Rose	NF	no factor TF: 59-64
2015-12-04	-anonymous-	NF	no factor TF: 71-72
2015-09-11	Mark Rose	NF	no factor TF: 70-71
2015-08-31	Gordon Spence	NF	no factor TF: 69-70
2011-07-11	Michael C	C-LL	BF6AAE0E01BE7C76
2009-12-31	-anonymous-	NF	no factor TF: 68-69
2009-08-21	James Heinrich	NF-PM1	B1=585000, B2=17257500, E=6
2008-09-23	Carsten Kossendey	NF	no factor TF: 67-68
2008-09-13	Carsten Kossendey	NF	no factor TF: 67-68
2008-07-04	Carsten Kossendey	NF	no factor TF: 66-67
2008-06-13	Carsten Kossendey	NF	no factor TF: 64-65
2008-06-13	Carsten Kossendey	NF	no factor TF: 65-66
2003-06-09	Thomas Mullen	NF	no factor TF: 1-59