2 377 Exponent Status

PrimeNet Exponent Status

M_n

Details

Composite, with 1 known prime factor. Cofactor is composite.

Trial Factored to 2⁶⁸

TF target 2⁴⁴

Factored

Factor	Digits	Bits	Date
227428848043888440045045261533777705948742974440394358593	57	187.2	2019-04-13 16:01:32

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	60884 / 194238

Estimated T-Level: 61.6 ⓘ

TF below 2^200 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift	Software
Factored		Unknown	0281	0	Unknown,(aka U)
Factored		George Woltman	DA482050E9120281	0	Woltman,Prime95,first web release,(aka W4)
Factored		Brian J. Beesley	DA482050E9120281	0	Mac,John Sweeney,v1.4,(aka J3)
Factored	2015-04-11	MadPoo 🙂	DA482050E9120281	367	Windows 64-bit,Prime95,v26,(aka We4)

PRP Cofactor

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	No proof (small exponent)	2019-04-13	matzetoni	4CEFF35DA7BC80BD	1	724	5	3
Verified	No proof (small exponent)	2019-04-13	ATH	4CEFF35DA7BC80BD	1	270	5	3
Verified	No proof (small exponent)	2019-04-15	Ruzovej	4CEFF35DA7BC80BD	1	0	5	3
Verified	No proof (small exponent)	2020-04-17	Oliver Kruse	4CEFF35DA7BC80BD	1	1833	5	3

History

Date	User	Type	Result
2026-02-08	Jason Lynch	NF-PM1	B1=129202709000, B2=679695500461927950
2025-04-05	masser	NF-PP1	Start=181/59, B1=4400000000, B2=4395600000000
2020-04-17	Oliver Kruse	C-PRP	M2377/227428848043888440045045261533777705948742974440394358593 : 4CEFF35DA7BC80BD
2019-04-15	Ruzovej	C-PRP	M2377/227428848043888440045045261533777705948742974440394358593 : 4CEFF35DA7BC80BD
2019-04-13	ATH	C-PRP	M2377/227428848043888440045045261533777705948742974440394358593 : 4CEFF35DA7BC80BD
2019-04-13	matzetoni	C-PRP	M2377/227428848043888440045045261533777705948742974440394358593 : 4CEFF35DA7BC80BD
2019-04-13	Ryan Propper	F-ECM	Factor: 227428848043888440045045261533777705948742974440394358593
2017-12-05	snme2pm1	NF	no factor TF: 63-64
2017-02-12	James Hintz	NF-PM1	B1=3025470995872, B2=242037679669760, E=12
2016-09-01	snme2pm1	NF	no factor TF: 62-63
2016-02-23	LaurV	NF	no factor TF: 57-58
2015-06-22	trebor	NF-PM1	B1=100000000000, B2=10000000000000, E=12
2015-05-29	snme2pm1	NF	no factor TF: 61-62
2015-04-11	MadPoo 🙂	C-LL	DA482050E9120281
2014-03-03	BloodIce	NF-PM1	B1=540000000000
2013-06-25	BloodIce	NF-PM1	B1=240000000000
2013-06-19	BloodIce	NF-PM1	B1=120000000000
2012-05-22	bcp19	NF	no factor TF: 60-61
2011-05-20	Joss	NF-PM1	B1=20000000000
2010-12-11	monst	NF	no factor TF: 58-60
2009-09-23	James Hintz	NF-PM1	B1=10000000000, B2=200000000000, E=12
2009-03-23	klajok	NF-PM1	B1=4290000000, B2=429000000000, E=12
2005-01-10	-anonymous-	NF-PM1	B1=1000000, B2=100000000
2005-01-10	-anonymous-	NF-PM1	B1=250000, B2=25000000
2002-12-25	-anonymous-	NF-PM1	B1=4290000000
2002-12-02	Alex Kruppa	NF	no factor TF: 1-57
2002-09-14	-anonymous-	NF-PM1	B1=3221225472, B2=4290000000, E=48
2002-08-03	-anonymous-	NF-PM1	B1=2147483648, B2=4290000000, E=48
2001-06-03	-anonymous-	NF-PM1	B1=3000000000, B2=4290000000
2001-02-11	-anonymous-	NF-PM1	B1=1000000, B2=100000000
2000-08-01	-anonymous-	NF	no factor TF: 1-56
2000-05-05	-anonymous-	NF	no factor TF: 1-55
2000-01-25	-anonymous-	NF	no factor TF: 54-55
1999-12-15	-anonymous-	NF	no factor TF: 53-54
1999-09-22	-anonymous-	NF	no factor TF: 52-53
1999-09-14	-anonymous-	NF	no factor TF: 50-51
1998-07-05	-anonymous-	NF	no factor TF: 50-52

Username
Password