178 349 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Composite: proven not-prime with Lucas-Lehmer test

No factors below 2⁶⁶

TF target 2⁴⁴

TF below 2^114 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	160000000
B2 =	10683083190780

ECM

Estimated T-Level: 35.7 ⓘ

Status	Date	User	Residue	Shift
Verified		Amdahl 6 - 1989	00C29B85	0
Verified		Conrad Curry	D4A7315340C29B85	0
Verified		Brian J. Beesley	D4A7315340C29B85	0
Verified		Eivind Triel	D4A7315340C29B85	29688
Verified	2016-06-01	MadPoo	D4A7315340C29B85	51510

History

Date	User	Type	Result
2023-06-06	JacobZ	NF-PM1	B1=160000000, B2=10683083190780
2023-03-12	Joss	NF-PM1	B1=10001000, B2=783284201700
2023-02-27	masser	NF-PP1	Start=6/5, B1=40000000, B2=1360000000
2023-02-16	masser	NF-PP1	Start=185/71, B1=40000000, B2=1360000000
2023-02-11	masser	NF-PP1	Start=2/7, B1=40000000, B2=1400000000
2023-01-17	Joss	NF-PM1	B1=10001000, B2=74759955270
2022-03-07	LordJulius	NF	no factor from 2^54 to 2^55
2017-02-28	Conductor	NF	no factor from 2^65 to 2^66
2016-06-01	MadPoo	C-LL	D4A7315340C29B85
2016-05-09	Yxinity	NF	no factor from 2^64 to 2^65
2016-02-23	Mark Rose	NF	no factor from 2^57 to 2^58
2016-01-31	Gordon Spence	NF	no factor from 2^63 to 2^64
2016-01-31	Gordon Spence	NF	no factor from 2^62 to 2^63
2015-08-13	NR	NF	no factor from 2^61 to 2^62
2013-10-01	alpertron	NF-PM1	B1=100000000, B2=2000000000, E=12
2013-08-23	lycorn	NF	no factor from 2^60 to 2^61
2011-03-02	Joss	NF-PM1	B1=10000000
2009-01-27	axn	NF-PM1	B1=5000000, B2=200000000, E=12
2009-01-25	Sturle Sunde	NF	no factor from 2^59 to 2^60
2008-12-31	Sturle Sunde	NF	no factor from 2^58 to 2^59

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