55 583 687 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 =	550000
B2 =	11962500

Status	Date	User	Residue	Shift	Software
Verified	2012-11-26	-anonymous-	426ABD5261834DE5	28390447	Mac OS X 64-bit,Prime95,v25.11,build 2
Verified	2021-03-28	Dubslow	426ABD5261834DE5	25307269	Linux 64-bit,Prime95,v29.8,build 6

History

Date	User	Type	Result
2021-03-28	Dubslow	C-LL	426ABD5261834DE5
2019-05-13	Chuck	NF	no factor TF: 73-74
2016-02-05	-anonymous-	NF	no factor TF: 72-73
2012-11-26	-anonymous-	C-LL	426ABD5261834DE5
2012-07-17	owftheevil	NF-PM1	B1=550000, B2=11962500, E=12
2012-07-07	TheJudger	NF	no factor TF: 71-72
2011-09-14	MOmax	NF	no factor TF: 70-71
2011-05-31	Tom Duell	NF	no factor TF: 69-70
2011-05-02	Gymnasium_Raubling	NF	no factor TF: 68-69
2009-06-14	-anonymous-	NF	no factor TF: 67-68
2009-03-11	ANONYMOUS	NF	no factor TF: 66-67
2009-03-10	ANONYMOUS	NF	no factor TF: 65-66
2009-03-07	-anonymous-	NF	no factor TF: 64-65
2008-07-28	-anonymous-	NF	no factor TF: 1-64
2002-08-03	-anonymous-	NF	no factor TF: 1-58
2001-09-30	-anonymous-	NF	no factor TF: 1-57
2000-05-31	-anonymous-	NF	no factor TF: 1-56
2000-03-01	-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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