56 511 869 Exponent Status

PrimeNet Exponent Status

M_n

Details

Composite: proven not-prime with Lucas-Lehmer test

No factors below 2⁷⁴

TF target 2⁷³

P-1

B1 =	565000
B2 =	12288750

Status	Date	User	Residue	Shift	Software
Verified	2013-04-24	Javier	299BADE32E920BCA	26727898	Windows 64-bit,Prime95,v27.9,build 1
Verified	2020-12-16	Dubslow	299BADE32E920BCA	46697044	Linux 64-bit,Prime95,v29.8,build 6

History

Date	User	Type	Result
2020-12-16	Dubslow	C-LL	299BADE32E920BCA
2018-10-18	linament	NF	no factor TF: 73-74
2016-02-23	Mark Rose	NF	no factor TF: 63-64
2016-01-22	-anonymous-	NF	no factor TF: 72-73
2013-04-24	Javier	C-LL	299BADE32E920BCA
2012-07-24	Nesowa	NF-PM1	B1=565000, B2=12288750, E=12
2012-05-18	Craig Meyers	NF	no factor TF: 71-72
2012-02-27	nate.anders	NF	no factor TF: 70-71
2011-06-26	megavink	NF	no factor TF: 69-70
2011-04-14	Paul Leyland	NF	no factor TF: 68-69
2009-11-19	usmfun	NF	no factor TF: 67-68
2008-06-03	Sturle Sunde	NF	no factor TF: 66-67
2008-06-02	Sturle Sunde	NF	no factor TF: 65-66
2008-03-05	Chad Davis	NF	no factor TF: 64-65
2003-09-29	ThomRuley	NF	no factor TF: 1-63
2003-07-21	ThomRuley	NF	no factor TF: 1-60
2002-10-12	-anonymous-	NF	no factor TF: 1-58
2001-09-22	-anonymous-	NF	no factor TF: 1-57
2000-06-11	-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
1999-12-15	-anonymous-	NF	no factor TF: 1-53

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