18 149 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 2^164 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	1000000000000
B2 =	1402034650733706990

ECM

Estimated T-Level: 50.9 ⓘ

Status	Date	User	Residue	Shift
Verified		Unknown	66D4	0
Verified		George Woltman	D406E4A8EEC9E6D4	0
Verified		Brian J. Beesley	D406E4A8EEC9E6D4	0
Verified	2015-04-11	MadPoo	D406E4A8EEC9E6D4	1780

History

Date	User	Type	Result
2024-09-25	-Anonymous-	NF-PM1	B1=1000000000000, B2=1402034650733706990
2023-08-26	masser	NF-PP1	Start=6/5, B1=420000000, B2=75180000000
2023-07-08	masser	NF-PP1	Start=102/41, B1=420000000, B2=16800000000
2022-04-29	-Anonymous-	NF-PM1	B1=100000000000, B2=80107051974399450
2022-03-27	Ruslan Borisov	NF	no factor from 2^65 to 2^66
2021-05-09	ATH	NF-PP1	Start=2/7, B1=1000000000, B2=241000000000
2021-02-14	Ruslan Borisov	NF	no factor from 2^64 to 2^65
2019-05-13	alex	NF-PM1	B1=10000000000, B2=500000000000, E=12
2018-05-20	snme2pm1	NF	no factor from 2^63 to 2^64
2016-12-23	James Hintz	NF-PM1	B1=1852705571, B2=114867745402, E=12
2016-04-25	Sid & Andy	NF	no factor from 2^62 to 2^63
2016-02-23	LaurV	NF	no factor from 2^57 to 2^58
2016-02-23	LaurV	NF	no factor from 2^58 to 2^59
2016-02-23	LaurV	NF	no factor from 2^59 to 2^60
2015-08-29	snme2pm1	NF	no factor from 2^61 to 2^62
2015-04-11	MadPoo	C-LL	D406E4A8EEC9E6D4
2015-02-16	Jayder	NF-PM1	B1=1172220000, B2=35360118869, E=12
2013-11-16	David Campeau	NF-PM1	B1=1172220000
2013-11-11	David Campeau	NF-PM1	B1=937775000
2013-10-29	David Campeau	NF-PM1	B1=703330000
2013-10-22	David Campeau	NF-PM1	B1=468885000
2013-10-19	David Campeau	NF-PM1	B1=234445000
2012-12-25	bcp19	NF	no factor from 2^60 to 2^61
2010-03-17	GrunwalderGIMP	NF	no factor from 2^1 to 2^60

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