51 168 331 Exponent Status

PrimeNet Exponent Status

M_n

Details

Composite: proven not-prime with Lucas-Lehmer test

No factors below 2⁷³

TF target 2⁷³

P-1

B1 =	610000
B2 =	19520000

Status	Date	User	Residue	Shift	Software
Verified	2011-03-07	Kyle Z Schmidt	D4B5016FAB4249B2	30408587	Windows 64-bit,Prime95,v26.5,build 5
Verified	2019-01-09	-anonymous-	D4B5016FAB4249B2	18901140	Windows 64-bit,Prime95,v29.4,build 8

History

Date	User	Type	Result
2019-01-09	-anonymous-	C-LL	D4B5016FAB4249B2
2016-02-23	Mark Rose	NF	no factor TF: 60-63
2015-12-27	AirSquirrels	NF	no factor TF: 72-73
2015-11-29	ATH	NF	no factor TF: 71-72
2015-10-12	VictordeHollander	NF	no factor TF: 70-71
2014-12-27	monst	NF	no factor TF: 69-70
2011-03-07	Kyle Z Schmidt	C-LL	D4B5016FAB4249B2
2009-10-09	KScorp	NF	no factor TF: 68-69
2009-09-29	Sturle Sunde	NF-PM1	B1=610000, B2=19520000, E=6
2009-04-28	jfarek	NF	no factor TF: 67-68
2009-04-23	jfarek	NF	no factor TF: 66-67
2009-04-19	dlerick66	NF	no factor TF: 65-66
2009-04-16	bayanne	NF	no factor TF: 64-65
2009-04-15	borgyg	NF	no factor TF: 63-64
2003-10-14	apocalypse	NF	no factor TF: 1-60
2002-02-10	-anonymous-	NF	no factor TF: 1-58
2001-05-06	-anonymous-	NF	no factor TF: 1-57
2000-04-05	-anonymous-	NF	no factor TF: 1-56
2000-02-16	-anonymous-	NF	no factor TF: 1-54
2000-01-04	-anonymous-	NF	no factor TF: 1-53
1999-10-15	-anonymous-	NF	no factor TF: 1-53

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