1 745 621 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Composite: proven not-prime with Lucas-Lehmer test

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 =	17000000
B2 =	272007836100

ECM

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

Estimated T-Level: 25.8 ⓘ

Status	Date	User	Residue	Shift
Verified		Mikael Billberg	57890D65CCD35B16	0
Verified	1998-11-28	Matthew Gauthier	57890D65CCD35B16	1528116
Verified	2015-07-18	MadPoo	57890D65CCD35B16	1651580

History

Date	User	Type	Result
2023-07-17	linament	NF-PM1	B1=17000000, B2=272007836100
2023-07-07	linament	NF-PM1	B1=17000000
2023-06-22	Joss	NF-PM1	B1=1745621, B2=5765173260
2023-02-22	Joss	NF-PM1	B1=1745621, B2=2408690130
2023-01-04	Joss	NF-PM1	B1=1745621, B2=930895350
2022-08-02	masser	NF-PP1	Start=173/11, B1=1700000, B2=61200000
2019-06-24	TJAOI	NF	no factor from 2^67 to 2^68
2018-10-18	Joss	NF-PM1	B1=1745621, B2=192018310, E=12
2018-07-20	Joss	NF-PM1	B1=1745621, B2=174562100, E=12
2017-11-03	TJAOI	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^61 to 2^62
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2015-09-04	ramgeis	NF	no factor from 2^65 to 2^66
2015-07-18	MadPoo	C-LL	57890D65CCD35B16
2015-05-12	snme2pm1	NF	no factor from 2^64 to 2^65
2015-05-12	snme2pm1	NF	no factor from 2^63 to 2^64
2015-04-19	mikr	NF-PM1	B1=2475400, B2=86660000, E=12
2014-09-15	-Anonymous-	NF-PM1	B1=173538
2014-05-06	Joss	NF-PM1	B1=136769
2014-04-05	Joss	NF-PM1	B1=100000
2011-02-10	Carsten Kossendey	NF-PM1	B1=95000, B2=1543750, E=6
2010-11-18	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2010-04-24	Architects Cubed	NF	no factor from 2^60 to 2^61

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