2 143 027 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
751276342478688096199090993	27	89.3	2020-12-17 07:58:29

ECM

Digits	B1	Curves
25	50000	137 / 280

Estimated T-Level: 22.4 ⓘ

TF below 2^70 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Paul McJones	B0224374CFEF9172	0
Verified (Factored)	1999-03-26	Nick Oulton	B0224374CFEF9172	713698
Verified (Factored)	2018-04-07	kkmrkkblmbrbk	B0224374CFEF9172	315703

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-12-17	mrh	4CE55C2D437A9102	1	932121	5	3

History

Date	User	Type	Result
2020-12-17	Ben Delo	CERT	PRP Certification Proof certified good
2020-12-17	mrh	C-PRP	M2143027/751276342478688096199090993 : 4CE55C2D437A9102 PRP proof power = 7 PRP: Verified Proof certified good
2020-12-17	daveward2005	F-ECM	Factor: 751276342478688096199090993 / (ECM curve 3, B1=50000, B2=5000000, Sigma=1428332348488642)
2019-04-15	TJAOI	NF	no factor from 2^67 to 2^68
2018-04-07	kkmrkkblmbrbk	C-LL	B0224374CFEF9172
2017-11-03	mikr	NF-PM1	B1=2500000, B2=125000000, E=12
2017-04-27	Joss	NF-PM1	B1=422268, B2=4222680, E=6
2017-04-22	Joss	NF-PM1	B1=351890, B2=3518900, E=6
2016-11-12	Joss	NF-PM1	B1=211134
2016-10-29	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-06-05	Joss	NF-PM1	B1=175945, B2=5265000, E=6
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2015-12-27	ramgeis	NF	no factor from 2^65 to 2^66
2015-03-18	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-18	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-10-28	Joss	NF-PM1	B1=159950
2013-09-07	ramgeis	NF	no factor from 2^62 to 2^63
2011-01-24	James Heinrich	NF-PM1	B1=130000, B2=2632500, E=6
2011-01-13	Joss	NF-PM1	B1=50000
2010-12-30	Joss	NF-PM1	B1=30000
2010-11-02	-Anonymous-	NF-PM1	B1=20000
2009-01-07	Sturle Sunde	NF	no factor from 2^61 to 2^62
2009-01-04	Sturle Sunde	NF	no factor from 2^60 to 2^61

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