2 778 547 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
80240969889113884965799	23	76.1	2020-08-23 18:18:36

ECM

Digits	B1	Curves
25	50000	37 / 280

Estimated T-Level: 20.7 ⓘ

TF below 2^64 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Ben Mathews	74998A97AD6E9ED5	0
Verified (Factored)	1999-05-02	Steve Jackson	74998A97AD6E9ED5	1377270
Verified (Factored)	2018-08-25	kkmrkkblmbrbk	74998A97AD6E9ED5	2139260

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-08-23	mrh	5300E0497637376B	1	2243632	5	3
Verified	2020-08-24	kutens	5300E0497637376B	1	2480518	5	3

History

Date	User	Type	Result
2020-08-24	kutens	C-PRP	M2778547/80240969889113884965799 : 5300E0497637376B PRP: Verified PRP without proof (not generated)
2020-08-23	mrh	C-PRP	M2778547/80240969889113884965799 : 5300E0497637376B PRP: Verified PRP without proof (not generated)
2020-08-23	GAN	F-ECM	Factor: 80240969889113884965799 / (ECM curve 4, B1=50000, B2=5000000, Sigma=7607843329537409)
2019-02-24	chuenkit	NF	no factor from 2^67 to 2^68
2018-08-25	kkmrkkblmbrbk	C-LL	74998A97AD6E9ED5
2017-10-14	Gordon Spence	NF	no factor from 2^66 to 2^67
2017-03-24	mikr	NF-PM1	B1=2700000, B2=84000000, E=12
2017-03-11	Joss	NF-PM1	B1=315187, B2=3151870, E=6
2017-01-10	Joss	NF-PM1	B1=262656
2017-01-10	Joss	NF-PM1	B1=218880
2016-12-18	Joss	NF-PM1	B1=182400
2016-08-06	Joss	NF-PM1	B1=152000, B2=4785000, E=6
2016-02-23	Mark Rose	NF	no factor from 2^1 to 2^60
2015-12-10	omylist	NF	no factor from 2^65 to 2^66
2015-04-21	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-04-21	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-01-14	dbaugh	NF	no factor from 2^62 to 2^63
2012-03-29	Grant McCracken	NF	no factor from 2^61 to 2^62
2010-11-27	markr	NF-PM1	B1=110000, B2=2392500, E=6
2010-11-10	Joss	NF-PM1	B1=15000
2009-01-28	Sturle Sunde	NF	no factor from 2^60 to 2^61

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