2 266 679 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
3749199233229739437047	22	71.7	2020-08-15 21:49:19

ECM

Digits	B1	Curves
25	50000	96 / 280

Estimated T-Level: 21.7 ⓘ

TF below 2^67 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Timo Aaltonen and friends	1B71F1C2577F57F6	0
Verified (Factored)	1999-05-02	Mark Hanna	1B71F1C2577F57F6	672196
Verified (Factored)	2018-04-25	kkmrkkblmbrbk	1B71F1C2577F57F6	510915

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-08-15	Xyzzy	2AF352857C243565	1	211511	5	3

History

Date	User	Type	Result
2020-08-16	George Woltman	CERT	PRP Certification Proof certified good
2020-08-15	Xyzzy	C-PRP	M2266679/3749199233229739437047 : 2AF352857C243565 PRP proof power = 7 PRP: Verified Proof certified good
2020-08-15	daveward2005	F-ECM	Factor: 3749199233229739437047 / (ECM curve 3, B1=50000, B2=5000000)
2019-11-23	BigBrother	NF-PM1	B1=3000000, B2=90000000, E=12
2019-05-06	TJAOI	NF	no factor from 2^67 to 2^68
2018-04-25	kkmrkkblmbrbk	C-LL	1B71F1C2577F57F6
2017-01-15	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-04-10	Joss	NF-PM1	B1=447897, B2=16251666, E=12
2016-04-02	Joss	NF-PM1	B1=373248, B2=3732480, E=6
2016-04-02	Joss	NF-PM1	B1=311040
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2015-10-31	ramgeis	NF	no factor from 2^65 to 2^66
2015-03-10	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-10	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-09-02	Joss	NF-PM1	B1=128316
2013-12-06	Jerry Hallett	NF	no factor from 2^62 to 2^63
2012-05-05	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-01-03	markr	NF-PM1	B1=100000, B2=2100000, E=6
2010-11-12	Joss	NF-PM1	B1=30000
2010-11-06	Joss	NF-PM1	B1=15000
2009-01-11	Sturle Sunde	NF	no factor from 2^60 to 2^61

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