71 711 251 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Composite: proven not-prime with Lucas-Lehmer test

No factors below 2⁷⁶

TF target 2⁷⁴

P-1

B1 =	1000000
B2 =	20000000

Status	Date	User	Residue	Shift
Verified	2015-08-11	moshix	4153422BFB42F29A	51951925
Verified	2023-06-21	Mirra	4153422BFB42F29A	22522879

History

Date	User	Type	Result
2023-06-21	Mirra	C-LL	4153422BFB42F29A
2023-01-17	tottenhoff	NF	no factor from 2^75 to 2^76
2015-08-11	moshix	C-LL	4153422BFB42F29A
2015-03-30	NickOfTime	NF	no factor from 2^74 to 2^75
2014-05-07	NickOfTime	NF	no factor from 2^73 to 2^74
2014-05-07	NickOfTime	NF	no factor from 2^72 to 2^73
2011-11-21	Never Odd Or Even	NF-PM1	B1=1000000, B2=20000000
2011-11-20	Never Odd Or Even	NF-PM1	B1=1000000, B2=15000000
2011-11-19	Never Odd Or Even	NF-PM1	B1=1000000, B2=10000000
2011-11-18	Never Odd Or Even	NF-PM1	B1=1000000, B2=5000000
2011-05-19	-Anonymous-	NF	no factor to 2^72
2011-04-27	tsc	NF	no factor to 2^70
2011-04-19	Never Odd Or Even	NF-PM1	B1=1000000
2011-04-18	Never Odd Or Even	NF-PM1	B1=500000
2011-04-17	Never Odd Or Even	NF-PM1	B1=250000
2011-04-12	Never Odd Or Even	NF-PM1	B1=100000
2010-07-30	Dr. Nowak	NF	no factor from 2^68 to 2^69
2010-07-23	Dr. Nowak	NF	no factor from 2^67 to 2^68
2010-07-16	Dr. Nowak	NF	no factor from 2^66 to 2^67
2010-07-09	Dr. Nowak	NF	no factor from 2^65 to 2^66
2010-07-02	Dr. Nowak	NF	no factor from 2^64 to 2^65
2008-09-29	-Anonymous-	NF	no factor to 2^64

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