282 851 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Composite: proven not-prime with Lucas-Lehmer test

No factors below 2⁶⁸

TF target 2⁴⁴

TF below 2^102 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	147000000
B2 =	3016244881650

ECM

Estimated T-Level: 32.1 ⓘ

Status	Date	User	Residue	Shift
Verified		David Slowinski	258	0
Verified		Larry English	B27BF02EE8DA0258	0
Verified		Brian J. Beesley	B27BF02EE8DA0258	0
Verified		Eivind Triel	B27BF02EE8DA0258	276092
Verified	2016-06-01	MadPoo	B27BF02EE8DA0258	35512

History

Date	User	Type	Result
2024-08-03	oodaira	NF-PM1	B1=1000000000, B2=832390969410
2023-09-29	tim s	NF	no factor from 2^67 to 2^68
2023-09-20	tim s	NF	no factor from 2^66 to 2^67
2023-02-05	masser	NF-PP1	Start=6/5, B1=20000000, B2=620000000
2023-01-28	masser	NF-PP1	Start=123/13, B1=20000000, B2=620000000
2023-01-27	masser	NF-PP1	Start=2/7, B1=20000000, B2=620000000
2022-06-21	Sid & Andy	NF-PM1	B1=147000000, B2=3016244881650
2022-03-07	LordJulius	NF	no factor from 2^54 to 2^55
2019-12-03	Gordon Spence	NF	no factor from 2^65 to 2^66
2019-05-02	alex	NF-PM1	B1=100000000, B2=2000000000, E=12
2018-03-29	Gordon Spence	NF	no factor from 2^64 to 2^65
2016-06-01	MadPoo	C-LL	B27BF02EE8DA0258
2016-01-05	Gordon Spence	NF	no factor from 2^63 to 2^64
2016-01-05	Gordon Spence	NF	no factor from 2^62 to 2^63
2015-08-13	NR	NF	no factor from 2^61 to 2^62
2013-07-21	c10ck3r	NF	no factor from 2^60 to 2^61
2013-07-19	c10ck3r	NF-PM1	B1=15000000, B2=300000000, E=12
2012-05-15	Joss	NF-PM1	B1=5124618
2012-02-26	Joss	NF-PM1	B1=2135257
2011-02-18	Joss	NF-PM1	B1=2000000
2009-01-27	Sturle Sunde	NF	no factor from 2^59 to 2^60
2009-01-01	Sturle Sunde	NF	no factor from 2^58 to 2^59

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