2 655 251 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
5642582681605538051091400777	28	92.2	2021-01-29 07:49:21

ECM

Digits	B1	Curves
25	50000	82 / 280

Estimated T-Level: 21.5 ⓘ

TF below 2^66 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)	1998-03-03	John Mercer	078CD2FFDAB492D8	0
Verified (Factored)	1999-09-14	Vytautas Bernotas	078CD2FFDAB492D8	84475
Verified (Factored)	2018-07-20	kkmrkkblmbrbk	078CD2FFDAB492D8	942874

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2021-01-29	ViliamF	DBEB9ADC44ED3FF2	1	2599257	5	3

History

Date	User	Type	Result
2021-01-29	ThunderBird	CERT	PRP Certification Proof certified good
2021-01-29	ViliamF	C-PRP	M2655251/5642582681605538051091400777 : DBEB9ADC44ED3FF2 PRP proof power = 7 PRP: Verified Proof certified good
2021-01-29	GAN	F-ECM	Factor: 5642582681605538051091400777 / (ECM curve 1, B1=50000, B2=5000000, Sigma=3948584785015677)
2019-11-30	masser	NF-PM1	B1=2000000, B2=50000000, E=12
2018-07-20	kkmrkkblmbrbk	C-LL	078CD2FFDAB492D8
2017-05-08	Joss	NF-PM1	B1=360000, B2=3600000, E=6
2016-12-27	Joss	NF-PM1	B1=206388
2016-12-26	Joss	NF-PM1	B1=171990
2016-12-24	Joss	NF-PM1	B1=143325
2016-02-23	Mark Rose	NF	no factor from 2^59 to 2^60
2013-01-27	dbaugh	NF	no factor from 2^71 to 2^72
2012-11-04	dbaugh	NF	no factor from 2^70 to 2^71
2012-09-05	dbaugh	NF	no factor from 2^69 to 2^70
2012-07-28	dbaugh	NF	no factor from 2^68 to 2^69
2012-07-23	dbaugh	NF	no factor from 2^67 to 2^68
2012-07-23	dbaugh	NF	no factor from 2^66 to 2^67
2012-07-18	dbaugh	NF	no factor from 2^65 to 2^66
2012-07-18	dbaugh	NF	no factor from 2^64 to 2^65
2012-07-16	dbaugh	NF	no factor from 2^63 to 2^64
2012-07-15	dbaugh	NF	no factor from 2^62 to 2^63
2012-05-28	markr	NF	no factor from 2^61 to 2^62
2011-01-16	James Heinrich	NF-PM1	B1=180000, B2=4320000, E=6
2009-06-23	USAFSS	NF-PM1	B1=30000, B2=420000
2009-01-27	Sturle Sunde	NF	no factor from 2^60 to 2^61

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