2 377 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

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

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
Verified (Factored)		Unknown	0281	0
Verified (Factored)		George Woltman	DA482050E9120281	0
Verified (Factored)		Brian J. Beesley	DA482050E9120281	0
Verified (Factored)	2015-04-11	MadPoo	DA482050E9120281	367

PRP Cofactor

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2019-04-13	matzetoni	4CEFF35DA7BC80BD	1	724	5	3
Verified	2019-04-13	ATH	4CEFF35DA7BC80BD	1	270	5	3
Verified	2019-04-15	Ruzovej	4CEFF35DA7BC80BD	1	0	5	3
Verified	2020-04-17	Oliver Kruse	4CEFF35DA7BC80BD	1	1833	5	3

History

Date	User	Type	Result
2025-04-05	masser	NF-PP1	Start=181/59, B1=4400000000, B2=4395600000000
2020-04-17	Oliver Kruse	C-PRP	M2377/227428848043888440045045261533777705948742974440394358593 : 4CEFF35DA7BC80BD PRP: Verified PRP without proof (small exponent)
2019-04-15	Ruzovej	C-PRP	M2377/227428848043888440045045261533777705948742974440394358593 : 4CEFF35DA7BC80BD PRP: Verified PRP without proof (small exponent)
2019-04-13	ATH	C-PRP	M2377/227428848043888440045045261533777705948742974440394358593 : 4CEFF35DA7BC80BD PRP: Verified PRP without proof (small exponent)
2019-04-13	matzetoni	C-PRP	M2377/227428848043888440045045261533777705948742974440394358593 : 4CEFF35DA7BC80BD PRP: Verified PRP without proof (small exponent)
2019-04-13	Ryan Propper	F-ECM	Factor: 227428848043888440045045261533777705948742974440394358593
2017-12-05	snme2pm1	NF	no factor from 2^63 to 2^64
2017-02-12	James Hintz	NF-PM1	B1=3025470995872, B2=242037679669760, E=12
2016-09-01	snme2pm1	NF	no factor from 2^62 to 2^63
2016-02-23	LaurV	NF	no factor from 2^57 to 2^58
2015-06-22	trebor	NF-PM1	B1=100000000000, B2=10000000000000, E=12
2015-05-29	snme2pm1	NF	no factor from 2^61 to 2^62
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 from 2^60 to 2^61
2011-05-20	Joss	NF-PM1	B1=20000000000
2010-12-11	monst	NF	no factor from 2^58 to 2^60
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

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