33 155 867 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 2⁷¹

P-1

B1 =	420000
B2 =	7875000

Status	Date	User	Residue	Shift	Software
Verified	2006-10-01	C. Cooper / S. Boone	ECF5C6B941A2A929	22645978	Windows,Prime95,v23,NT service,(aka WZ5)
Verified	2014-10-01	Dubslow	ECF5C6B941A2A929	23659519	Linux 64-bit,Prime95,v28.5,build 2

History

Date	User	Type	Result
2020-01-26	Architects Cubed	NF-PM1	B1=420000, B2=7875000, E=12
2019-11-15	-anonymous-	NF	no factor TF: 71-72
2019-11-15	-anonymous-	NF	no factor TF: 72-73
2014-10-01	Dubslow	C-LL	ECF5C6B941A2A929
2014-01-22	kracker	NF	no factor TF: 70-71
2012-12-18	bcp19	NF	no factor TF: 69-70
2012-12-18	bcp19	NF	no factor TF: 68-69
2006-10-01	curtisc	C-LL	ECF5C6B941A2A929
2006-09-04	curtisc	NF	no factor TF: 1-68
2006-09-04	curtisc	NF-PM1	B1=495000
2006-01-01	dlsilver	NF	no factor TF: 1-67
2005-07-17	-anonymous-	NF	no factor TF: 1-62
2005-01-10	1997rj7	NF	no factor TF: 1-61
2000-12-07	Joss	NF	no factor TF: 1-56