38 174 683 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 2⁷⁵

TF target 2⁷¹

P-1

B1 =	600000
B2 =	12000000

Status	Date	User	Residue	Shift	Software
Verified	2007-06-15	Ars Technica Team Prime Rib	4A91DA5486F488D2	3017530	Windows,Prime95,v23,(aka WZ1)
Verified	2016-11-25	Dubslow	4A91DA5486F488D2	35494830	Linux 64-bit,Prime95,v28.7,build 1

History

Date	User	Type	Result
2020-06-23	Smok_bmv	NF	no factor TF: 74-75
2020-06-22	Smok_bmv	NF	no factor TF: 73-74
2020-06-22	Smok_bmv	NF	no factor TF: 72-73
2018-10-13	Architects Cubed	NF	no factor TF: 71-72
2016-11-25	Dubslow	C-LL	4A91DA5486F488D2
2014-12-02	monst	NF	no factor TF: 70-71
2014-10-26	HBendtz	NF	no factor TF: 69-70
2014-06-27	HBendtz	NF-PM1	B1=600000, B2=12000000, E=12
2007-06-15	Team Prime Rib	C-LL	4A91DA5486F488D2
2007-04-23	Team Prime Rib	NF	no factor TF: 1-69
2007-04-23	Team Prime Rib	NF-PM1	B1=545000
2006-06-13	-anonymous-	NF	no factor TF: 1-68
2003-09-14	-anonymous-	NF	no factor TF: 1-59
2003-09-09	-anonymous-	NF	no factor TF: 1-60