2 719 Exponent Status

PrimeNet Exponent Status

M_n

Details

Composite: proven not-prime with Lucas-Lehmer test

No factors below 2⁶⁶

TF target 2⁴⁴

P-1

B1 =	6000000000000
B2 =	9223372036854775807

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	160664 / 350860

Estimated T-Level: 67.3 ⓘ

TF below 2^219 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift	Software
Verified		Unknown	1C43	0	Unknown,(aka U)
Verified		George Woltman	F11C68200EA21C43	0	Woltman,Prime95,first web release,(aka W4)
Verified		Brian J. Beesley	F11C68200EA21C43	0	Mac,John Sweeney,v1.4,(aka J3)
Verified	2015-04-11	MadPoo 🙂	F11C68200EA21C43	751	Windows 64-bit,Prime95,v26,(aka We4)

History

Date	User	Type	Result
2025-06-20	Anton Repko	NF-PM1	B1=6000000000000, B2=1.8002581982519E+19
2024-12-08	coffeeguy	NF-PM1	B1=2000000000000, B2=2500766411279556420
2023-08-11	masser	NF-PP1	Start=6/5, B1=3580000000, B2=640820000000
2023-07-16	masser	NF-PP1	Start=124/41, B1=3580000000, B2=143200000000
2023-07-03	masser	NF-PM1	B1=216000000000, B2=486755758363664790
2022-05-22	Anton Repko	NF	no factor TF: 65-66
2021-05-13	ATH	NF-PP1	Start=2/7, B1=1000000000, B2=241000000000
2021-02-17	Anton Repko	NF	no factor TF: 64-65
2018-03-03	snme2pm1	NF	no factor TF: 63-64
2016-10-10	snme2pm1	NF	no factor TF: 62-63
2016-06-14	alex	NF-PM1	B1=1000000000000, B2=10154590139388108
2016-05-08	-anonymous-	NF-PM1	B1=100000000000, B2=1000000000000, E=12
2016-02-23	LaurV	NF	no factor TF: 57-58
2015-07-02	snme2pm1	NF	no factor TF: 61-62
2015-04-11	MadPoo 🙂	C-LL	F11C68200EA21C43
2013-09-30	David Campeau	NF-PM1	B1=10229590000, B2=716071300000, E=12
2012-05-22	bcp19	NF	no factor TF: 60-61
2011-04-17	Joss	NF-PM1	B1=10000000000
2011-01-19	monst	NF	no factor TF: 58-60
2003-02-16	Alex Kruppa	NF	no factor TF: 1-57
2003-01-25	Alex Kruppa	NF	no factor TF: 1-57
2003-01-16	Alex Kruppa	NF	no factor TF: 1-57
2002-12-31	-anonymous-	NF-PM1	B1=4290000000
2002-09-14	-anonymous-	NF-PM1	B1=3221225472, B2=4290000000, E=48
2002-08-03	-anonymous-	NF-PM1	B1=2147483648, B2=4290000000, E=48
2002-06-02	-anonymous-	NF-PM1	B1=1073741824, B2=4290000000
2001-06-09	-anonymous-	NF-PM1	B1=3000000000, B2=4290000000
2001-06-03	-anonymous-	NF-PM1	B1=43000000, B2=4290000000
2001-02-11	-anonymous-	NF-PM1	B1=1000000, B2=100000000
2000-08-10	-anonymous-	NF	no factor TF: 1-56
2000-02-01	-anonymous-	NF	no factor TF: 54-55
1999-12-23	-anonymous-	NF	no factor TF: 53-54
1999-12-23	-anonymous-	NF	no factor TF: 53-54
1999-09-22	-anonymous-	NF	no factor TF: 52-53
1998-06-20	-anonymous-	NF	no factor TF: 50-52

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