631 847 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
18787373960257593918224994771964315201057	41	133.8	2022-10-01 06:30:47

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	241 / 640

Estimated T-Level: 26.9 ⓘ

TF below 2^84 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		David Slowinski	3F9D	0
Verified (Factored)		Tom Waskow	CAF150669671FF9D	0
Verified (Factored)		Klaus Kastens	CAF150669671FF9D	466521
Verified (Factored)	2015-04-11	MadPoo	CAF150669671FF9D	65936

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2022-10-01	masser	0B6E2D95163D1E0A	1	284739	5	3

P-1 factors

Date	Factor	B1	B2
2022-10-01	18787373960257593918224994771964315201057	51000000	728120893500

History

Date	User	Type	Result
2022-10-01	curtisc	CERT	PRP Certification Proof certified good
2022-10-01	masser	C-PRP	M631847/18787373960257593918224994771964315201057 : 0B6E2D95163D1E0A PRP proof power = 6 PRP: Verified Proof certified good
2022-10-01	masser	F-PM1	Factor: 18787373960257593918224994771964315201057 / (P-1, B1=51000000, B2=728120893500)
2022-08-29	masser	NF-PP1	Start=2/7, B1=5100000, B2=219300000
2022-03-07	LordJulius	NF	no factor from 2^54 to 2^55
2020-11-24	Carlos Pinho	NF-PM1	B1=45000, B2=1932000, E=6
2018-12-13	Smok_bmv	NF	no factor from 2^68 to 2^69
2018-12-12	Smok_bmv	NF	no factor from 2^67 to 2^68
2018-12-12	Smok_bmv	NF	no factor from 2^66 to 2^67
2017-07-18	Smok_bmv	NF	no factor from 2^65 to 2^66
2017-06-23	Smok_bmv	NF	no factor from 2^64 to 2^65
2015-11-11	Sid & Andy	NF-PM1	B1=6318470, B2=189554100, E=12
2015-10-11	Gordon Spence	NF	no factor from 2^63 to 2^64
2015-10-11	Gordon Spence	NF	no factor from 2^62 to 2^63
2015-06-06	lycorn	NF	no factor from 2^61 to 2^62
2015-04-11	MadPoo	C-LL	CAF150669671FF9D
2013-10-16	David Campeau	NF-PM1	B1=1285000, B2=41120000, E=12
2012-08-04	Joss	NF-PM1	B1=1263694
2012-06-19	Joss	NF-PM1	B1=631853
2011-09-05	Joss	NF-PM1	B1=602499
2011-07-10	Joss	NF-PM1	B1=361499
2011-01-07	Sid & Andy	NF	no factor from 2^60 to 2^61
2008-10-12	Sturle Sunde	NF	no factor from 2^59 to 2^60
2008-10-12	Sturle Sunde	NF	no factor from 2^58 to 2^59

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