68 028 071 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 2⁷⁴

P-1

B1 =	710000
B2 =	16685000

Status	Date	User	Residue	Shift	Software
Verified	2015-11-30	Kyle Z Schmidt	41313920812450AF	37063993	Windows 64-bit,Prime95,v28.5,build 2
Verified	2016-12-30	-anonymous-	41313920812450AF	12483890	Windows,Prime95,v27.9,build 1

History

Date	User	Type	Result
2016-12-30	-anonymous-	C-LL	41313920812450AF
2016-03-28	Mark Rose	NF	no factor TF: 53-63
2015-11-30	Kyle Z Schmidt	C-LL	41313920812450AF
2015-11-04	ktony	NF	no factor TF: 74-75
2014-05-11	TheJudger	NF	no factor TF: 73-74
2014-05-11	TheJudger	NF	no factor TF: 72-73
2014-04-20	TheJudger	NF-PM1	B1=710000, B2=16685000, E=12
2014-01-27	bayanne	NF	no factor TF: 71-72
2012-07-22	E.Lechner	NF	no factor TF: 70-71
2012-05-14	Markucsb	NF	no factor TF: 69-70
2010-04-06	eon_blue_apocalypse	NF	no factor TF: 68-69
2010-03-20	arnaud	NF	no factor TF: 67-68
2010-03-15	arnaud	NF	no factor TF: 66-67
2010-03-13	H_Reid	NF	no factor TF: 65-66
2009-04-11	Al Airone	NF	no factor TF: 64-65
2008-11-06	kmd	NF	no factor TF: 63-64
2000-09-29	Joss	NF	no factor TF: 1-53