2 250 461 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
91296294649961187458295551	26	86.2	2021-09-04 21:13:00

ECM

Digits	B1	Curves
25	50000	170 / 280

Estimated T-Level: 23.0 ⓘ

TF below 2^72 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Antonio Oliveira	716983849F666392	0
Verified (Factored)	1999-03-01	Hgin normaalilyseo	716983849F666392	17113
Verified (Factored)	2018-04-23	kkmrkkblmbrbk	716983849F666392	787326

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2021-09-05	SRJ2877	3FE478B5E7F592CE	1	1767458	5	3

History

Date	User	Type	Result
2021-09-05	Simon Josefsson	CERT	PRP Certification Proof certified good
2021-09-05	SRJ2877	C-PRP	M2250461/91296294649961187458295551 : 3FE478B5E7F592CE PRP proof power = 7 PRP: Verified Proof certified good
2021-09-04	mnd9	F-ECM	Factor: 91296294649961187458295551 / (ECM curve 4, B1=50000, B2=5000000, Sigma=4255107824809696)
2021-06-24	TJAOI	NF	no factor from 2^68 to 2^69
2019-06-27	BigBrother	NF-PM1	B1=1000000, B2=20000000, E=12
2019-05-20	TJAOI	NF	no factor from 2^67 to 2^68
2018-04-23	kkmrkkblmbrbk	C-LL	716983849F666392
2017-01-05	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-03-02	Joss	NF-PM1	B1=342144, B2=6158592, E=12
2016-02-23	Mark Rose	NF	no factor from 2^1 to 2^60
2015-10-27	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=128521
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
2011-01-06	markr	NF-PM1	B1=100000, B2=2075000, E=6
2010-11-11	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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