1 822 487 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 =	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		Ken Kriesel	8CB8034E7A18C915	0
Verified	1998-12-06	Malcolm Wilkins	8CB8034E7A18C915	1495758
Verified	2015-06-28	MadPoo	8CB8034E7A18C915	846893

History

Date	User	Type	Result
2023-09-25	kurly	NF-PM1	B1=25000000, B2=69189473430
2023-07-05	Joss	NF-PM1	B1=1822487, B2=6364293390
2023-03-17	Joss	NF-PM1	B1=1822487, B2=2752517460
2023-01-08	Joss	NF-PM1	B1=1822487, B2=1007468280
2023-01-08	Joss	NF-PM1	B1=1822487, B2=921200280
2022-10-29	masser	NF-PP1	Start=2/7, B1=800000, B2=25600000
2022-10-28	masser	NF-PP1	Start=6/5, B1=400000, B2=10800000
2022-10-27	masser	NF-PP1	Start=122/43, B1=200000, B2=4400000
2019-07-08	TJAOI	NF	no factor from 2^67 to 2^68
2018-09-10	Joss	NF-PM1	B1=1822487, B2=182248700, E=12
2018-05-28	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 2^58 to 2^60
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2015-09-03	ramgeis	NF	no factor from 2^65 to 2^66
2015-06-28	MadPoo	C-LL	8CB8034E7A18C915
2015-06-07	mikr	NF-PM1	B1=2780000, B2=91760000, E=12
2015-04-25	snme2pm1	NF	no factor from 2^64 to 2^65
2015-04-25	snme2pm1	NF	no factor from 2^63 to 2^64
2014-09-22	Joss	NF-PM1	B1=170436
2014-05-19	Joss	NF-PM1	B1=135218
2011-10-02	USAFSS	NF-PM1	B1=100000, B2=1675000, E=6
2011-03-08	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2010-04-11	Architects Cubed	NF	no factor from 2^60 to 2^61

Username
Password