478 679 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 2^98 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	70000000
B2 =	866921175120

ECM

Estimated T-Level: 31.1 ⓘ

Status	Date	User	Residue	Shift
Verified		David Slowinski	2A07	0
Verified		David Einstein	38BFF284AC06EA07	0
Verified		Klaus Kastens	38BFF284AC06EA07	0
Verified		Eivind Triel	38BFF284AC06EA07	190214
Verified	2016-06-01	MadPoo	38BFF284AC06EA07	127739

History

Date	User	Type	Result
2023-10-31	Joss	NF-PM1	B1=5345425, B2=20272051800
2023-10-29	masser	NF-PM1	B1=70000000, B2=866921175120
2023-10-03	Joss	NF-PM1	B1=1000000, B2=144430245960
2023-07-22	Joss	NF-PM1	B1=1000000, B2=67920202350
2022-12-17	masser	NF-PP1	Start=6/5, B1=8000000, B2=216000000
2022-12-17	masser	NF-PP1	Start=2/7, B1=16000000, B2=496000000
2022-12-10	masser	NF-PP1	Start=73/29, B1=4000000, B2=96000000
2022-11-21	Joss	NF-PM1	B1=1000000, B2=27671143500
2022-05-27	Gordon Spence	NF	no factor from 2^67 to 2^68
2022-03-07	LordJulius	NF	no factor from 2^54 to 2^55
2021-10-04	BloodERazor	NF	no factor from 2^66 to 2^67
2018-11-07	BloodERazor	NF	no factor from 2^65 to 2^66
2018-01-13	BloodERazor	NF	no factor from 2^64 to 2^65
2016-06-01	MadPoo	C-LL	38BFF284AC06EA07
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2015-11-18	Gordon Spence	NF	no factor from 2^63 to 2^64
2015-11-18	Gordon Spence	NF	no factor from 2^62 to 2^63
2012-12-01	dbaugh	NF	no factor from 2^61 to 2^62
2012-11-27	dbaugh	NF	no factor from 2^60 to 2^61
2012-09-27	markr	NF-PM1	B1=10000000, B2=400000000, E=12
2010-11-10	Rob_Dee	NF-PM1	B1=1000000, B2=2000000, E=6
2009-08-26	James Hintz	NF-PM1	B1=500000, B2=10000000, E=12

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