2 257 391 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
94985195986912985781184972626273157249	38	126.2	2021-06-20 05:12:04

ECM

Digits	B1	Curves
25	50000	161 / 280

Estimated T-Level: 22.9 ⓘ

TF below 2^71 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Jeffrey L. Vagle	8825D339A5C93D0B	0
Verified (Factored)	1999-03-15	M Hoogesteger	8825D339A5C93D0B	1365391
Verified (Factored)	2018-04-23	kkmrkkblmbrbk	8825D339A5C93D0B	920885

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2021-06-21	M8909387	580A0B69E7C33F44	1	503115	5	3

P-1 factors

Date	Factor	B1	B2
2021-06-20	94985195986912985781184972626273157249	1200000	121200000

History

Date	User	Type	Result
2021-06-21	Chun sung soo	CERT	PRP Certification Proof certified good
2021-06-21	M8909387	C-PRP	M2257391/94985195986912985781184972626273157249 : 580A0B69E7C33F44 PRP proof power = 7 PRP: Verified Proof certified good
2021-06-20	Dylan Delgado	F-PM1	Factor: 94985195986912985781184972626273157249 / (P-1, B1=1200000, B2=121200000)
2021-06-17	TJAOI	NF	no factor from 2^68 to 2^69
2019-06-28	BigBrother	NF-PM1	B1=1000000, B2=20000000, E=12
2019-05-13	TJAOI	NF	no factor from 2^67 to 2^68
2018-04-23	kkmrkkblmbrbk	C-LL	8825D339A5C93D0B
2017-01-15	Gordon Spence	NF	no factor from 2^66 to 2^67
2017-01-15	Conductor	NF	no factor from 2^66 to 2^67
2016-03-25	Joss	NF-PM1	B1=342144, B2=3421440, E=6
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2015-10-29	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=128433
2013-12-04	LaurV	NF	no factor from 2^62 to 2^63
2012-05-04	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-01-05	markr	NF-PM1	B1=100000, B2=2075000, 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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