2 080 321 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
26077759519728594028343	23	74.5	2020-03-13 19:16:18

ECM

Digits	B1	Curves
25	50000	74 / 280

Estimated T-Level: 21.3 ⓘ

TF below 2^66 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Phil Nesser	C2F8B6D812EB7E66	0
Verified (Factored)		David Linton	C2F8B6D812EB7E66	0
Verified (Factored)	1999-01-17	Robert Mutschler	C2F8B6D812EB7E66	708032

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-03-14	Christoph Zenger	1AC156F03D02A33A	1	2028372	5	3
Verified	2020-03-14	GunnarLu	1AC156F03D02A33A	1	1799494	5	3

History

Date	User	Type	Result
2020-03-14	GunnarLu	C-PRP	M2080321/26077759519728594028343 : 1AC156F03D02A33A PRP: Verified PRP without proof (not generated)
2020-03-14	Christoph Zenger	C-PRP	M2080321/26077759519728594028343 : 1AC156F03D02A33A PRP: Verified PRP without proof (not generated)
2020-03-13	Sergey Nosov	F-ECM	Factor: 26077759519728594028343 / (ECM curve 2, B1=50000, B2=5000000)
2019-04-01	chuenkit	NF	no factor from 2^67 to 2^68
2017-05-13	Joss	NF-PM1	B1=390302, B2=3903020, E=6
2017-03-28	mikr	NF-PM1	B1=2500000, B2=125000000, E=12
2016-11-11	Joss	NF-PM1	B1=315252
2016-11-05	Joss	NF-PM1	B1=262710
2016-11-04	Joss	NF-PM1	B1=218925
2016-09-14	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-07-16	Joss	NF-PM1	B1=182438, B2=6210000, E=12
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2015-11-05	omylist	NF	no factor from 2^65 to 2^66
2015-03-31	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-31	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-09-02	ramgeis	NF	no factor from 2^62 to 2^63
2012-03-17	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-01-21	James Heinrich	NF-PM1	B1=135000, B2=3105000, E=6
2011-01-07	Joss	NF-PM1	B1=50000
2010-12-28	Joss	NF-PM1	B1=30000
2009-07-25	USAFSS	NF-PM1	B1=20000, B2=260000
2009-01-03	Sturle Sunde	NF	no factor from 2^60 to 2^61

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