1 861 261 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

1861261

No factors below 2⁶⁸

TF target 2⁶¹

TF below 2^81 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	25000000
B2 =	69189473430

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	106 / 640

Estimated T-Level: 25.8 ⓘ

Status	Date	User	Residue	Shift
Verified		matt thomlinson	2FEFBEADDA05842B	0
Verified	1999-01-02	Ferenc Ka`rpa`ti	2FEFBEADDA05842B	1411117
Verified	2015-07-16	MadPoo	2FEFBEADDA05842B	1216254

History

Date	User	Type	Result
2024-01-01	kurly	NF-PM1	B1=25000000, B2=69189473430
2023-06-10	Joss	NF-PM1	B1=2579889, B2=8441583150
2023-01-09	Joss	NF-PM1	B1=2579889, B2=1646214570
2022-11-01	masser	NF-PP1	Start=2/7, B1=800000, B2=25600000
2022-10-29	masser	NF-PP1	Start=6/5, B1=400000, B2=10800000
2022-10-27	masser	NF-PP1	Start=114/17, B1=200000, B2=4400000
2019-07-01	TJAOI	NF	no factor from 2^67 to 2^68
2018-10-25	Joss	NF-PM1	B1=2579889, B2=204738710, E=12
2018-09-17	Joss	NF-PM1	B1=2579889, B2=186126100, E=12
2018-05-14	TJAOI	NF	no factor from 2^66 to 2^67
2018-02-23	Joss	NF-PM1	B1=2579889, B2=92876004, E=12
2017-06-13	Joss	NF-PM1	B1=2579889, B2=46438002, E=12
2017-05-22	Joss	NF-PM1	B1=2149908, B2=21499080, E=12
2017-03-28	Joss	NF-PM1	B1=1791590, B2=17915900, E=12
2017-03-25	Joss	NF-PM1	B1=1492992, B2=14929920, E=12
2017-02-12	Joss	NF-PM1	B1=1244160, B2=12441600, E=12
2017-01-14	Joss	NF-PM1	B1=1036800
2016-12-30	Joss	NF-PM1	B1=864000
2016-12-19	Joss	NF-PM1	B1=720000
2016-10-29	Joss	NF-PM1	B1=600000
2016-10-07	Joss	NF-PM1	B1=500000, B2=39600000, E=6
2016-09-30	Joss	NF-PM1	B1=500000, B2=33000000, E=6
2016-09-13	Joss	NF-PM1	B1=500000, B2=30000000, E=12
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2016-02-23	Mark Rose	NF	no factor from 2^61 to 2^62
2015-10-07	Bruno Victal	NF-PM1	B1=500000, B2=15000000, E=12
2015-09-10	ramgeis	NF	no factor from 2^65 to 2^66
2015-07-16	MadPoo	C-LL	2FEFBEADDA05842B
2015-05-07	snme2pm1	NF	no factor from 2^64 to 2^65
2015-05-07	snme2pm1	NF	no factor from 2^63 to 2^64
2012-01-05	markr	NF-PM1	B1=275000, B2=6000000, E=12
2011-03-08	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2010-04-06	Architects Cubed	NF	no factor from 2^60 to 2^61

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