2 949 887 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
6438894507363974464481	22	72.4	2020-08-21 12:03:12

ECM

Digits	B1	Curves
25	50000	18 / 280

Estimated T-Level: 20.3 ⓘ

TF below 2^63 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Brian Pinto	C6E31A43CC9D3F70	0
Verified (Factored)	1999-07-26	david triggerson	C6E31A43CC9D3F70	2147228
Verified (Factored)	2018-10-12	kkmrkkblmbrbk	C6E31A43CC9D3F70	2688854

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-08-21	Numberwang	EE0F376A29451A4F	1	2516167	5	3

History

Date	User	Type	Result
2020-08-21	Ben Delo	CERT	PRP Certification Proof certified good
2020-08-21	Numberwang	C-PRP	M2949887/6438894507363974464481 : EE0F376A29451A4F PRP proof power = 7 PRP: Verified Proof certified good
2020-08-21	mnd9	F-ECM	Factor: 6438894507363974464481 / (ECM curve 3, B1=50000, B2=5000000, Sigma=5123233070181697)
2018-12-24	chuenkit	NF	no factor from 2^67 to 2^68
2018-10-12	kkmrkkblmbrbk	C-LL	C6E31A43CC9D3F70
2017-11-28	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-02-25	ramgeis	NF	no factor from 2^65 to 2^66
2016-02-23	Mark Rose	NF	no factor from 2^1 to 2^60
2015-04-30	VictordeHollander	NF-PM1	B1=1000000, B2=20000000, E=12
2015-04-27	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-04-27	VictordeHollander	NF	no factor from 2^63 to 2^64
2015-04-08	Joss	NF-PM1	B1=785463
2015-03-29	Joss	NF-PM1	B1=714058
2015-03-14	Joss	NF-PM1	B1=590131
2015-03-10	Joss	NF-PM1	B1=536483
2015-02-27	Joss	NF-PM1	B1=487712
2015-02-23	Joss	NF-PM1	B1=443375
2015-02-15	Joss	NF-PM1	B1=403069
2015-02-11	Joss	NF-PM1	B1=366427
2015-02-03	Joss	NF-PM1	B1=206840
2015-02-01	Joss	NF-PM1	B1=188037
2015-01-30	Joss	NF-PM1	B1=170943
2015-01-26	Joss	NF-PM1	B1=141276
2014-11-10	Joss	NF-PM1	B1=116758
2013-01-07	dbaugh	NF	no factor from 2^62 to 2^63
2011-12-14	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2010-11-03	markr	NF-PM1	B1=95000, B2=1971250, E=6
2009-02-14	Sturle Sunde	NF	no factor from 2^60 to 2^61

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