2 775 043 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
1248894740878624687721	22	70.1	2020-10-21 18:01:58

ECM

Digits	B1	Curves
25	50000	50 / 280

Estimated T-Level: 20.9 ⓘ

TF below 2^64 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)	1997-12-04	Kevin Kennedy	7C3BC73B1E0CC369	0
Verified (Factored)	1999-07-04	Mike Sheppard	7C3BC73B1E0CC369	2618235
Verified (Factored)	2018-08-23	kkmrkkblmbrbk	7C3BC73B1E0CC369	1781070

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-10-21	mrh	0E2FE5A0CB32DF0A	1	261426	5	3

History

Date	User	Type	Result
2020-10-21	Ben Delo	CERT	PRP Certification Proof certified good
2020-10-21	mrh	C-PRP	M2775043/1248894740878624687721 : 0E2FE5A0CB32DF0A PRP proof power = 7 PRP: Verified Proof certified good
2020-10-21	mnd9	F-ECM	Factor: 1248894740878624687721 / (ECM curve 3, B1=50000, B2=5000000, Sigma=4046707531324967)
2019-02-24	chuenkit	NF	no factor from 2^67 to 2^68
2018-08-23	kkmrkkblmbrbk	C-LL	7C3BC73B1E0CC369
2017-10-12	Gordon Spence	NF	no factor from 2^66 to 2^67
2017-03-23	Joss	NF-PM1	B1=424009, B2=4240090, E=6
2017-03-19	Joss	NF-PM1	B1=353341, B2=3533410, E=6
2017-03-09	mikr	NF-PM1	B1=2700000, B2=84000000, E=12
2017-02-25	Joss	NF-PM1	B1=294451, B2=2944510, E=6
2016-12-23	Joss	NF-PM1	B1=204480
2016-10-26	Joss	NF-PM1	B1=170400
2016-08-27	Joss	NF-PM1	B1=142000, B2=4785000, E=6
2016-02-23	Mark Rose	NF	no factor from 2^1 to 2^60
2015-12-07	omylist	NF	no factor from 2^65 to 2^66
2015-04-21	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-04-21	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-01-14	dbaugh	NF	no factor from 2^62 to 2^63
2012-03-24	Grant McCracken	NF	no factor from 2^61 to 2^62
2010-11-28	markr	NF-PM1	B1=110000, B2=2392500, E=6
2010-11-10	Joss	NF-PM1	B1=15000
2009-01-29	Sturle Sunde	NF	no factor from 2^60 to 2^61

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