199 783 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

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

Factored

Factor	Digits	Bits	Date
348545539845669937460814400704618180031950462017	48	157.9	2023-04-20 06:24:32

ECM

Estimated T-Level: 31.5 ⓘ

TF below 2^99 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Amdahl 6 - 1989	3A77FA7D	0
Verified (Factored)		Martin Eibl	33CFDEC17A77FA7D	0
Verified (Factored)		Brian J. Beesley	33CFDEC17A77FA7D	0
Verified (Factored)		Eivind Triel	33CFDEC17A77FA7D	188112
Verified (Factored)	2016-06-01	MadPoo	33CFDEC17A77FA7D	10795

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2023-04-20	JacobZ	2BBB87FB5B10E6A6	1	70423	5	3
Verified	2023-08-24	USAFSS	2BBB87FB5B10E6A6	1	174592	5	3

P-1 factors

Date	Factor	B1	B2
2023-04-20	348545539845669937460814400704618180031950462017	133360846	8962925961990

History

Date	User	Type	Result
2023-08-24	Sudhindra.Pranesh	CERT	PRP Certification Proof certified good
2023-08-24	USAFSS	C-PRP	M199783/348545539845669937460814400704618180031950462017 : 2BBB87FB5B10E6A6 PRP proof power = 5 PRP: Verified Proof certified good
2023-04-20	Steve Jacobson	CERT	PRP Certification Proof certified good
2023-04-20	JacobZ	C-PRP	M199783/348545539845669937460814400704618180031950462017 : 2BBB87FB5B10E6A6 PRP proof power = 5 PRP: Verified Proof certified good
2023-04-20	JacobZ	F-PM1	Factor: 348545539845669937460814400704618180031950462017 / (P-1, B1=133360846, B2=8962925961990)
2023-02-25	masser	NF-PP1	Start=6/5, B1=30000000, B2=840000000
2023-02-11	masser	NF-PP1	Start=114/37, B1=30000000, B2=960000000
2023-02-09	masser	NF-PP1	Start=2/7, B1=30000000, B2=990000000
2023-01-24	Joss	NF-PM1	B1=1000000, B2=74894729910
2022-03-07	LordJulius	NF	no factor from 2^54 to 2^55
2019-12-13	Gordon Spence	NF	no factor from 2^65 to 2^66
2017-08-17	Conductor	NF	no factor from 2^64 to 2^65
2016-06-01	MadPoo	C-LL	33CFDEC17A77FA7D
2016-02-23	Mark Rose	NF	no factor from 2^57 to 2^58
2015-12-09	Gordon Spence	NF	no factor from 2^63 to 2^64
2015-12-07	Gordon Spence	NF	no factor from 2^62 to 2^63
2015-08-25	NR	NF	no factor from 2^61 to 2^62
2013-10-21	alpertron	NF-PM1	B1=100000000, B2=2000000000, E=12
2013-08-06	lycorn	NF	no factor from 2^60 to 2^61
2009-02-09	axn	NF-PM1	B1=5000000, B2=200000000, E=12
2009-01-30	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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