47 912 729 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 =	540000
B2 =	11340000

Status	Date	User	Residue	Shift	Software
Bad	2010-09-06	Helmut Kirrmaier	A31BF2C0BAF2E8C9	0	Glucas with shift counts,(aka G29)
Verified	2016-12-04	rudimeier	4F2E2ECDF7F648EE	20033106	Linux 64-bit,Prime95,v28.9,build 2
Verified	2016-12-09	ATH	4F2E2ECDF7F648EE	36747329	Windows 64-bit,Prime95,v28.9,build 2

History

Date	User	Type	Result
2024-06-07	LaurV	NF	no factor TF: 71-72
2018-02-13	ktony	NF	no factor TF: 72-73
2016-12-09	ATH	C-LL	4F2E2ECDF7F648EE
2016-12-04	rudimeier	C-LL	4F2E2ECDF7F648EE
2013-07-31	Architects Cubed	NF-PM1	B1=540000, B2=11340000, E=12
2013-07-27	Architects Cubed	NF	no factor TF: 71-72
2012-07-15	bcp19	NF	no factor TF: 70-71
2012-07-15	bcp19	NF	no factor TF: 69-70
2011-09-22	ANONYMOUS	NF	no factor TF: 1-69
2010-09-06	Helmut Kirrmaier	C-LL	A31BF2C0BAF2E8C9
2008-04-24	-anonymous-	NF	no factor TF: 1-69