644 353 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
277209911687956828940866491839	30	97.8	2021-01-16 06:05:33

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	212 / 640

Estimated T-Level: 26.7 ⓘ

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

Status	Date	User	Residue	Shift
Verified (Factored)		David Slowinski	3AA3	0
Verified (Factored)		Conrad Curry	C74B9C2C0C7EBAA3	0
Verified (Factored)		Herb Savage	C74B9C2C0C7EBAA3	0
Verified (Factored)	2015-04-11	MadPoo	C74B9C2C0C7EBAA3	61847

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2021-01-16	mrh	DE43EB5761ACF04B	1	231100	5	3

History

Date	User	Type	Result
2022-03-07	LordJulius	NF	no factor from 2^54 to 2^55
2021-01-16	Nick Thorpe	CERT	PRP Certification Proof certified good
2021-01-16	mrh	C-PRP	M644353/277209911687956828940866491839 : DE43EB5761ACF04B PRP proof power = 6 PRP: Verified Proof certified good
2021-01-16	GAN	F-ECM	Factor: 277209911687956828940866491839 / (ECM curve 3, B1=250000, B2=25000000, Sigma=3154144770232478)
2018-04-20	Smok_bmv	NF	no factor from 2^68 to 2^69
2017-10-03	Smok_bmv	NF	no factor from 2^67 to 2^68
2017-10-03	Smok_bmv	NF	no factor from 2^66 to 2^67
2017-07-24	Smok_bmv	NF	no factor from 2^65 to 2^66
2017-06-26	Smok_bmv	NF	no factor from 2^64 to 2^65
2015-11-14	Sid & Andy	NF-PM1	B1=6443530, B2=193305900, E=12
2015-10-18	Gordon Spence	NF	no factor from 2^63 to 2^64
2015-10-18	Gordon Spence	NF	no factor from 2^62 to 2^63
2015-06-01	lycorn	NF	no factor from 2^61 to 2^62
2015-04-11	MadPoo	C-LL	C74B9C2C0C7EBAA3
2013-10-18	David Campeau	NF-PM1	B1=1295000, B2=41440000, E=12
2012-08-11	Joss	NF-PM1	B1=1288706
2012-06-19	Joss	NF-PM1	B1=644359
2011-09-05	Joss	NF-PM1	B1=587381
2011-07-10	Joss	NF-PM1	B1=352428
2011-01-30	Sid & Andy	NF	no factor from 2^60 to 2^61
2008-10-11	Sturle Sunde	NF	no factor from 2^59 to 2^60
2008-10-11	Sturle Sunde	NF	no factor from 2^58 to 2^59

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