1 619 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

1619

Composite: proven not-prime with Lucas-Lehmer test

No factors below 2⁶⁶

TF target 2⁴⁴

TF below 2^214 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	2000000000000
B2 =	5242884041378733750

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	4588 / 4588
45	11000000	9201 / 9201
50	44000000	16550 / 16550
55	110000000	40830 / 40830
60	260000000	105362 / 105362
65	800000000	194238 / 194238
70	2400000000	67920 / 350860

Estimated T-Level: 66.0 ⓘ

Status	Date	User	Residue	Shift
Verified		Unknown	64E0	0
Verified		George Woltman	3F964611757CE4E0	0
Verified		Gord Palameta	3F964611757CE4E0	434
Verified	2015-04-11	MadPoo	3F964611757CE4E0	229

History

Date	User	Type	Result
2024-09-01	MooMoo2	NF-PM1	B1=2000000000000, B2=5242884041378733750
2024-02-06	ANONYMOUS	NF-PP1	Start=2/7, B1=6450000, B2=645000000
2024-01-19	ANONYMOUS	NF-PM1	B1=250000000000, B2=86578453271310
2023-08-09	masser	NF-PP1	Start=6/5, B1=6450000000, B2=1154550000000
2023-07-16	masser	NF-PP1	Start=115/19, B1=6450000000, B2=258000000000
2023-06-28	masser	NF-PM1	B1=216000000000, B2=1278447286523507100
2023-06-06	anonymous2	NF-PP1	Start=2/7, B1=134217728, B2=1879048192
2022-11-28	musava_ribica	NF-PM1	B1=1234567890123, B2=10112632860330
2022-11-26	musava_ribica	NF-PM1	B1=888888888888, B2=10013724490770
2022-11-21	musava_ribica	NF-PM1	B1=777777777777, B2=977702834428320
2022-11-20	musava_ribica	NF-PM1	B1=275275275275, B2=78963414009480
2022-11-14	musava_ribica	NF-PM1	B1=222222222222, B2=948273970373730
2022-05-04	Dobri	NF-PM1	B1=161916191619, B2=424465486442197200
2022-04-30	Dobri	NF	no factor from 2^39 to 2^40
2022-04-30	Dobri	NF	no factor from 2^1 to 2^39
2022-02-05	arachnotron	NF-PM1	B1=1000000, B2=100000000, E=12
2021-12-23	Smoker88	NF-PM1	B1=50000, B2=5000000, E=6
2021-05-12	ATH	NF-PP1	Start=2/7, B1=1000000000, B2=231000000000
2020-12-22	Ruslan Borisov	NF	no factor from 2^65 to 2^66
2018-06-06	Andriy Makukha	NF	no factor from 2^64 to 2^65
2017-11-15	snme2pm1	NF	no factor from 2^63 to 2^64
2016-09-28	James Hintz	NF-PM1	B1=3790662020300, B2=303252961624000, E=12
2016-05-18	snme2pm1	NF	no factor from 2^62 to 2^63
2016-02-23	James Hintz	NF-PM1	B1=2092126946740, B2=167370155739200, E=12
2015-07-08	MadPoo	NF-PM1	B1=1210100683469, B2=10000000000000, E=12
2015-06-06	snme2pm1	NF	no factor from 2^61 to 2^62
2015-04-11	MadPoo	C-LL	3F964611757CE4E0
2014-04-04	Sid & Andy	NF	no factor from 2^60 to 2^61
2013-04-02	Le Comte	NF-PM1	B1=100000000000, B2=10000000000000, E=12
2010-12-18	monst	NF	no factor from 2^58 to 2^60
2009-05-31	James Hintz	NF-PM1	B1=33000000000, B2=330000000000, E=12
2008-12-09	Matthias Wurtinger	NF-PM1	B1=30000000000
2008-12-07	Matthias Wurtinger	NF-PM1	B1=10000000000, B2=20000000000, E=12
2008-11-09	David Campeau	NF-PM1	B1=5000000000, B2=500000000000, E=12
2008-11-08	David Campeau	NF-PM1	B1=110000000, B2=11000000000, E=12
2008-11-08	David Campeau	NF-PM1	B1=100000000, B2=10000000000, E=12
2008-11-08	David Campeau	NF-PM1	B1=10000000, B2=1000000000, E=12
2008-11-08	David Campeau	NF-PM1	B1=1000000, B2=100000000, E=12

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