48 099 251 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 =	565000
B2 =	15255000

Status	Date	User	Residue	Shift	Software
Bad	2009-01-30	eskifullofbeer	5BE18C2A5E74633E	31638633	Windows,Prime95,v25.7,build 3
Verified	2015-08-30	MadPoo 🙂	B99257390B01378E	25587879	Windows 64-bit,Prime95,v26,(aka We4)
Verified	2016-08-26	AirSquirrels	B99257390B01378E	0	clLucas v1.04

History

Date	User	Type	Result
2017-12-12	Mark Rose	NF	no factor TF: 72-73
2016-08-26	AirSquirrels	C-LL	B99257390B01378E
2015-08-30	MadPoo 🙂	C-LL	B99257390B01378E
2015-08-24	AirSquirrels	NF	no factor TF: 71-72
2015-08-24	AirSquirrels	NF	no factor TF: 70-71
2015-08-12	Gordon Spence	NF	no factor TF: 69-70
2009-01-30	eskifullofbeer	C-LL	5BE18C2A5E74633E
2008-12-08	eskifullofbeer	NF-PM1	B1=565000, B2=15255000
2008-05-21	tmorrow	NF	no factor TF: 1-69
2003-10-08	Thomas Mullen	NF	no factor TF: 1-60
2003-06-09	Thomas Mullen	NF	no factor TF: 1-59