55 501 091 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 =	670000
B2 =	21105000

Status	Date	User	Residue	Shift	Software
Verified	2010-11-14	Kyle Z Schmidt	5CF3F521F4F35C80	31267896	Windows,Prime95,v25.9,build 4
Verified	2017-07-20	kkmrkkblmbrbk	5CF3F521F4F35C80	44379290	Linux 64-bit,Prime95,v29.2,build 3

History

Date	User	Type	Result
2025-05-27	NStorm	NF	no factor TF: 73-74
2017-07-20	kkmrkkblmbrbk	C-LL	5CF3F521F4F35C80
2016-01-29	-anonymous-	NF	no factor TF: 72-73
2012-05-13	Craig Meyers	NF	no factor TF: 71-72
2012-01-18	David Campeau	NF	no factor TF: 70-71
2011-11-18	garo	NF	no factor TF: 69-70
2010-11-14	Kyle Z Schmidt	C-LL	5CF3F521F4F35C80
2010-07-20	Kyle Z Schmidt	NF	no factor TF: 63-64
2010-07-20	Kyle Z Schmidt	NF	no factor TF: 64-65
2010-07-20	Kyle Z Schmidt	NF	no factor TF: 61-62
2010-07-20	Kyle Z Schmidt	NF	no factor TF: 1-61
2010-07-20	Kyle Z Schmidt	NF	no factor TF: 65-66
2010-07-20	Kyle Z Schmidt	NF	no factor TF: 62-63
2010-07-20	Kyle Z Schmidt	NF	no factor TF: 67-68
2010-07-20	Kyle Z Schmidt	NF	no factor TF: 66-67
2010-05-07	Kyle Z Schmidt	NF	no factor TF: 68-69
2010-05-05	Kyle Z Schmidt	NF-PM1	B1=670000, B2=21105000
2009-05-18	Hiwassee	NF	no factor TF: 67-68
2009-01-08	lycorn	NF	no factor TF: 66-67
2009-01-06	S36049	NF	no factor TF: 65-66
2009-01-04	grimacedface	NF	no factor TF: 64-65
2008-06-23	-anonymous-	NF	no factor TF: 1-64
2002-07-27	-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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