56 771 147 Exponent Status

PrimeNet Exponent Status

M_n

Details

Composite: proven not-prime with Lucas-Lehmer test

No factors below 2⁷⁵

TF target 2⁷³

P-1

B1 =	570000
B2 =	12255000

Status	Date	User	Residue	Shift	Software
Verified	2013-03-27	Amazon EC2	0E17CF5E65D45957	31905030	Linux 64-bit,Prime95,v27.9,build 1
Verified	2021-06-10	Dubslow	0E17CF5E65D45957	40220131	Linux 64-bit,Prime95,v29.8,build 6

History

Date	User	Type	Result
2021-06-10	Dubslow	C-LL	0E17CF5E65D45957
2018-12-31	Sid & Andy	NF	no factor TF: 74-75
2018-10-07	Chuck	NF	no factor TF: 73-74
2016-02-23	Mark Rose	NF	no factor TF: 62-63
2016-01-08	-anonymous-	NF	no factor TF: 72-73
2013-03-27	Amazon EC2	C-LL	0E17CF5E65D45957
2012-07-25	Sebastian Hornbostel	NF-PM1	B1=570000, B2=12255000, E=6
2012-07-06	Jerry Hallett	NF	no factor TF: 71-72
2011-09-07	BranMuffin	NF	no factor TF: 70-71
2011-06-14	-anonymous-	NF	no factor TF: 69-70
2011-04-21	tmorrow	NF	no factor TF: 68-69
2009-06-06	S485122	NF	no factor TF: 67-68
2008-08-16	Sturle Sunde	NF	no factor TF: 66-67
2008-08-11	Sturle Sunde	NF	no factor TF: 65-66
2008-08-10	Sturle Sunde	NF	no factor TF: 64-65
2008-08-10	Sturle Sunde	NF	no factor TF: 63-64
2005-01-20	ThomRuley	NF	no factor TF: 1-62
2004-02-23	ThomRuley	NF	no factor TF: 1-61
2002-11-02	-anonymous-	NF	no factor TF: 1-58
2001-09-30	-anonymous-	NF	no factor TF: 1-57
2000-06-29	-anonymous-	NF	no factor TF: 1-56
2000-06-28	-anonymous-	NF	no factor TF: 1-56
2000-03-08	-anonymous-	NF	no factor TF: 1-54
2000-01-19	-anonymous-	NF	no factor TF: 1-53
1999-12-23	-anonymous-	NF	no factor TF: 1-53

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