255 517 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
130343158442778222530580971263677568711	39	126.6	2024-03-07 19:08:07

ECM

Estimated T-Level: 35.6 ⓘ

TF below 2^113 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		David Slowinski	D68	0
Verified (Factored)		Unknown	0D68	0
Verified (Factored)		Brian J. Beesley	34DB51A055470D68	0
Verified (Factored)		Eivind Triel	34DB51A055470D68	37220
Verified (Factored)	2001-10-13	Brian J. Beesley	34DB51A055470D68	44220

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2024-03-07	Anton Tsvetkov	5E9CD16EA5496DD3	1	69393	5	3

P-1 factors

Date	Factor	B1	B2
2024-03-07	130343158442778222530580971263677568711	20000000000	20000000000

History

Date	User	Type	Result
2024-03-08	mattashii	CERT	PRP Certification Proof certified good
2024-03-07	Anton Tsvetkov	C-PRP	M255517/130343158442778222530580971263677568711 : 5E9CD16EA5496DD3 PRP proof power = 5 PRP: Verified Proof certified good
2024-03-07	-Anonymous-	F-PM1	Factor: 130343158442778222530580971263677568711 / (P-1, B1=20000000000)
2023-02-07	masser	NF-PP1	Start=6/5, B1=30000000, B2=990000000
2023-02-05	masser	NF-PP1	Start=184/29, B1=30000000, B2=960000000
2023-01-27	masser	NF-PP1	Start=2/7, B1=30000000, B2=990000000
2022-04-28	-Anonymous-	NF-PM1	B1=1000000000, B2=201454308905850
2022-03-12	Anton Repko	NF	no factor from 2^66 to 2^70
2021-12-05	Seth_Tr	NF-PM1	B1=120000000, B2=57783635910
2021-12-05	Seth_Tr	NF-PM1	B1=120000000
2020-01-01	Gordon Spence	NF	no factor from 2^65 to 2^66
2018-03-15	Gordon Spence	NF	no factor from 2^64 to 2^65
2016-02-23	Mark Rose	NF	no factor from 2^57 to 2^58
2016-01-30	Gordon Spence	NF	no factor from 2^63 to 2^64
2016-01-30	Gordon Spence	NF	no factor from 2^62 to 2^63
2015-08-25	NR	NF	no factor from 2^61 to 2^62
2013-09-18	lycorn	NF	no factor from 2^60 to 2^61
2013-09-05	c10ck3r	NF-PM1	B1=10000000, B2=200000000, E=12
2012-02-26	Joss	NF-PM1	B1=2436012
2011-02-09	Joss	NF-PM1	B1=2000000
2009-01-25	Sturle Sunde	NF	no factor from 2^59 to 2^60
2009-01-01	Sturle Sunde	NF	no factor from 2^58 to 2^59

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