2 121 653 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
1324808871561257686441	22	70.2	2020-09-29 07:20:11

ECM

Digits	B1	Curves
25	50000	128 / 280

Estimated T-Level: 22.3 ⓘ

TF below 2^69 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		The Grebelius Family	CBA73589B218CB45	0
Verified (Factored)		Brian J. Beesley	CBA73589B218CB45	0
Verified (Factored)	2015-11-14	MadPoo	CBA73589B218CB45	774491

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-09-29	ATH	143144D71EEEC0E0	1	1448149	5	3

History

Date	User	Type	Result
2020-09-29	Richard Thomas	CERT	PRP Certification Proof certified good
2020-09-29	ATH	C-PRP	M2121653/1324808871561257686441 : 143144D71EEEC0E0 PRP proof power = 7 PRP: Verified Proof certified good
2020-09-29	GAN	F-ECM	Factor: 1324808871561257686441 / (ECM curve 7, B1=50000, B2=5000000, Sigma=5924272644671283)
2019-05-06	TJAOI	NF	no factor from 2^67 to 2^68
2017-08-30	Joss	NF-PM1	B1=504000, B2=5040000, E=6
2017-08-24	mikr	NF-PM1	B1=2500000, B2=125000000, E=12
2017-08-19	Joss	NF-PM1	B1=420000, B2=4200000, E=6
2016-10-15	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-06-24	Joss	NF-PM1	B1=210000, B2=6090000, E=12
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2015-11-14	MadPoo	C-LL	CBA73589B218CB45
2015-10-21	omylist	NF	no factor from 2^65 to 2^66
2015-03-15	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-15	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-09-06	ramgeis	NF	no factor from 2^62 to 2^63
2012-04-02	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-01-24	James Heinrich	NF-PM1	B1=140000, B2=3045000, E=6
2011-01-11	Joss	NF-PM1	B1=50000
2011-01-01	Joss	NF-PM1	B1=30000
2009-08-03	USAFSS	NF-PM1	B1=20000, B2=265000
2009-01-03	Sturle Sunde	NF	no factor from 2^60 to 2^61

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