2 156 521 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
34953754494601615567351	23	74.9	2020-08-16 00:30:01

ECM

Digits	B1	Curves
25	50000	110 / 280

Estimated T-Level: 22.0 ⓘ

TF below 2^68 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		John Lyon	64C838646AF32A70	0
Verified (Factored)	1999-02-14	Lon Green	64C838646AF32A70	24285
Verified (Factored)	2018-04-10	kkmrkkblmbrbk	64C838646AF32A70	656229

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-08-16	M Miller	ACB3DD4F7716A295	1	16888	5	3
Verified	2020-08-16	atrench	ACB3DD4F7716A295	1	430557	5	3

History

Date	User	Type	Result
2020-08-16	atrench	C-PRP	M2156521/34953754494601615567351 : ACB3DD4F7716A295 PRP: Verified PRP without proof (not generated)
2020-08-16	DRobinsonPE	CERT	PRP Certification Proof certified good
2020-08-16	M Miller	C-PRP	M2156521/34953754494601615567351 : ACB3DD4F7716A295 PRP proof power = 7 PRP: Verified Proof certified good
2020-08-16	GAN	F-ECM	Factor: 34953754494601615567351 / (ECM curve 2, B1=50000, B2=5000000, Sigma=7634542590932491)
2019-09-25	mikr	NF-PM1	B1=4000000, B2=200000000, E=12
2019-05-20	TJAOI	NF	no factor from 2^67 to 2^68
2018-04-10	kkmrkkblmbrbk	C-LL	64C838646AF32A70
2017-09-19	Joss	NF-PM1	B1=576000, B2=5760000, E=6
2017-09-13	Joss	NF-PM1	B1=480000, B2=4800000, E=6
2016-11-03	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-04-15	Joss	NF-PM1	B1=240000, B2=8843430, E=12
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2015-12-30	ramgeis	NF	no factor from 2^65 to 2^66
2015-03-22	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-22	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-10-03	Joss	NF-PM1	B1=149763
2013-09-08	ramgeis	NF	no factor from 2^62 to 2^63
2011-01-24	markr	NF-PM1	B1=120000, B2=2340000, E=6
2010-11-10	Joss	NF-PM1	B1=60000
2010-11-07	Joss	NF-PM1	B1=45000
2010-11-06	Joss	NF-PM1	B1=30000
2010-11-04	Joss	NF-PM1	B1=15000
2009-01-06	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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