68 942 537 Exponent Status

PrimeNet Exponent Status

M_n

Details

Composite: proven not-prime with Lucas-Lehmer test

No factors below 2⁷⁵

TF target 2⁷⁴

P-1

B1 =	665000
B2 =	13300000

Status	Date	User	Residue	Shift	Software
Bad	2014-09-21	KIKUTANI, Shigeru	CA56C213069FE0A3	18681967	Windows 64-bit,Prime95,v27.9,build 1
Verified	2017-01-24	Mark Rose	7F26DE8764B4F54C	47541600	Linux 64-bit,Prime95,v28.9,build 2
Verified	2017-02-09	Torchwood Institute	7F26DE8764B4F54C	3346726	Windows 64-bit,Prime95,v28.9,build 2

History

Date	User	Type	Result
2024-06-14	LaurV	NF	no factor TF: 71-72
2017-02-09	Torchwood Institute	C-LL	7F26DE8764B4F54C
2017-02-06	Bruno Victal	NF	no factor TF: 74-75
2017-01-24	Mark Rose	C-LL	7F26DE8764B4F54C
2014-09-21	KIKUTANI, Shigeru	C-LL	CA56C213069FE0A3
2013-12-26	Chuck	NF	no factor TF: 73-74
2013-12-16	Bill Staffen	NF-PM1	B1=665000, B2=13300000
2013-12-06	gcardona	NF	no factor TF: 72-73
2013-12-03	Architects Cubed	NF	no factor TF: 71-72
2012-09-26	Bold_Seeker	NF	no factor TF: 70-71
2012-04-02	Marzbug	NF	no factor TF: 69-70
2010-04-18	seekua	NF	no factor TF: 68-69
2010-04-15	-anonymous-	NF	no factor TF: 67-68
2010-04-11	stephenson	NF	no factor TF: 66-67
2010-02-03	-anonymous-	NF	no factor TF: 65-66
2010-01-25	Sturle Sunde	NF	no factor TF: 64-65
2009-02-02	1997rj7	NF	no factor TF: 1-64
2008-03-03	lycorn	NF	no factor TF: 1-63
2004-04-29	mdrg	NF	no factor TF: 1-61
2001-05-13	Joss	NF	no factor TF: 1-56

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