45 448 639 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 =	495000
B2 =	11632500

Status	Date	User	Residue	Shift	Software
Verified	2011-12-24	Dubslow	D19BE93B3FE81B55	18136226	Windows 64-bit,Prime95,v26.6,build 3
Verified	2017-11-30	kracker	D19BE93B3FE81B55	26660512	Windows 64-bit,Prime95,v29.3,build 1

History

Date	User	Type	Result
2017-11-30	kracker	C-LL	D19BE93B3FE81B55
2017-11-10	RichD0	NF	no factor TF: 72-73
2015-11-06	-anonymous-	NF	no factor TF: 71-72
2015-11-06	-anonymous-	NF	no factor TF: 70-71
2011-12-24	Dubslow	C-LL	D19BE93B3FE81B55
2011-11-28	Dubslow	NF-PM1	B1=495000, B2=11632500, E=12
2011-10-25	Dubslow	NF	no factor TF: 68-70
2007-12-18	JC_Herles	NF	no factor TF: 1-68
2007-03-20	1997rj7	NF	no factor TF: 1-63