248 893 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 1 known prime factor. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
1022287884011395393641296785459591	34	109.7	2024-03-05 13:10:02

ECM

Estimated T-Level: 32.0 ⓘ

TF below 2^101 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		David Slowinski	3BDF	0
Verified (Factored)		Unknown	3BDF	0
Verified (Factored)		Ken Kiefer	9C8281189940BBDF	0
Verified (Factored)		Brian J. Beesley	9C8281189940BBDF	0
Verified (Factored)		Eivind Triel	9C8281189940BBDF	4331
Verified (Factored)	2016-06-01	MadPoo	9C8281189940BBDF	78117

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2024-03-05	lycorn	2A2EC9D6CA85F033	1	31359	5	3

History

Date	User	Type	Result
2024-03-05	KongoCache	CERT	PRP Certification Proof certified good
2024-03-05	lycorn	C-PRP	M248893/1022287884011395393641296785459591 : 2A2EC9D6CA85F033 PRP proof power = 5 PRP: Verified Proof certified good
2024-03-05	lycorn	F-ECM	Factor: 1022287884011395393641296785459591 / (ECM curve 130, B1=1100000, B2=11486399925, Sigma=409897467358541)
2023-02-11	masser	NF-PP1	Start=6/5, B1=30000000, B2=990000000
2023-02-05	masser	NF-PP1	Start=2/7, B1=30000000, B2=990000000
2023-02-05	masser	NF-PP1	Start=88/13, B1=30000000, B2=960000000
2022-05-29	Sid & Andy	NF-PM1	B1=263000000, B2=2865440107530
2022-03-07	LordJulius	NF	no factor from 2^54 to 2^55
2021-12-05	Seth_Tr	NF-PM1	B1=120000000
2021-12-05	Seth_Tr	NF-PM1	B1=120000000, B2=57783635910
2019-12-31	Gordon Spence	NF	no factor from 2^65 to 2^66
2018-03-12	Gordon Spence	NF	no factor from 2^64 to 2^65
2016-06-01	MadPoo	C-LL	9C8281189940BBDF
2016-05-13	Numberwang	NF-PM1	B1=2783, B2=69575
2016-02-23	Mark Rose	NF	no factor from 2^57 to 2^58
2016-01-27	Gordon Spence	NF	no factor from 2^63 to 2^64
2016-01-27	Gordon Spence	NF	no factor from 2^62 to 2^63
2015-08-10	snme2pm1	NF	no factor from 2^61 to 2^62
2014-12-24	Denial140	NF-PM1	B1=10000000, B2=250000000, E=12
2013-10-13	David Campeau	NF-PM1	B1=2570000, B2=74530000, E=12
2013-07-13	lycorn	NF	no factor from 2^60 to 2^61
2012-02-26	Joss	NF-PM1	B1=2520402
2011-07-24	Joss	NF-PM1	B1=2016322
2011-02-07	Joss	NF-PM1	B1=2000000
2009-01-24	Sturle Sunde	NF	no factor from 2^59 to 2^60
2008-12-31	Sturle Sunde	NF	no factor from 2^58 to 2^59

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