55 691 617 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 =	1000000
B2 =	30000000

Status	Date	User	Residue	Shift	Software
Verified	2012-03-05	Nicholas	1C8CF4A023381578	36134673	Windows 64-bit,Prime95,v26.6,build 3
Bad	2021-04-18	Michel Yamagishi	137A99F22096BFC3	55547303	Windows 64-bit,Prime95,v30.3,build 6
Verified	2021-04-29	Dubslow	1C8CF4A023381578	6780995	Linux 64-bit,Prime95,v29.8,build 6

History

Date	User	Type	Result
2021-04-29	Dubslow	C-LL	1C8CF4A023381578
2021-04-19	riccardo uberti	NF-PM1	B1=1000000, B2=30000000, E=12
2021-04-18	Michel Yamagishi	C-LL	137A99F22096BFC3
2018-08-28	Mark Rose	NF	no factor TF: 73-74
2016-02-12	-anonymous-	NF	no factor TF: 72-73
2015-12-04	Sid & Andy	NF	no factor TF: 71-72
2012-03-05	Nicholas	C-LL	1C8CF4A023381578
2011-08-28	TheJudger	NF	no factor TF: 70-71
2011-07-28	NB	NF	no factor TF: 69-70
2011-07-11	-anonymous-	NF	no factor TF: 68-69
2011-07-10	TheJudger	NF-PM1	B1=665000, B2=18952500, E=6
2009-05-17	Sturle Sunde	NF	no factor TF: 67-68
2009-02-12	Andrey Kurgannikov	NF	no factor TF: 66-67
2009-02-09	joy	NF	no factor TF: 65-66
2009-01-21	Dan	NF	no factor TF: 64-65
2008-09-14	-anonymous-	NF	no factor TF: 1-64
2002-08-10	-anonymous-	NF	no factor TF: 1-58
2001-09-30	-anonymous-	NF	no factor TF: 1-57
2000-06-11	-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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