837 797 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Composite: proven not-prime with Lucas-Lehmer test

No factors below 2⁶⁸

TF target 2⁴⁴

TF below 2^86 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	35000000
B2 =	9993888354450

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	302 / 640

Estimated T-Level: 27.4 ⓘ

Status	Date	User	Residue	Shift
Verified		David Slowinski	170A	0
Verified		Paul Victor Novarese	B880D46C00CD970A	0
Verified		David Tegerdine	B880D46C00CD970A	0
Verified	2015-04-11	MadPoo	B880D46C00CD970A	259151

History

Date	User	Type	Result
2023-12-04	Ethan O'Connor	NF-PM1	B1=35000000, B2=9993888354450
2023-10-15	Joss	NF-PM1	B1=4273114, B2=16626019410
2023-10-12	Joss	NF-PM1	B1=4273114, B2=7896324150
2023-10-04	Joss	NF-PM1	B1=4273114
2023-10-01	masser	NF-PP1	Start=6/5, B1=10000000, B2=790000000
2023-09-24	masser	NF-PP1	Start=107/59, B1=10000000, B2=790000000
2023-07-16	Joss	NF-PM1	B1=1000000, B2=30828978180
2023-03-22	Joss	NF-PM1	B1=1000000, B2=13369536180
2022-12-10	Joss	NF-PM1	B1=1000000, B2=4639815180
2021-08-09	gLauss	NF-PP1	Start=2/7, B1=7500000, B2=585000000
2017-12-18	Smok_bmv	NF	no factor from 2^67 to 2^68
2017-12-18	Smok_bmv	NF	no factor from 2^66 to 2^67
2017-12-18	Smok_bmv	NF	no factor from 2^65 to 2^66
2016-02-18	lycorn	NF	no factor from 2^64 to 2^65
2015-10-03	Gordon Spence	NF	no factor from 2^63 to 2^64
2015-10-03	Gordon Spence	NF	no factor from 2^62 to 2^63
2015-04-11	MadPoo	C-LL	B880D46C00CD970A
2015-02-20	TJAOI	NF	no factor from 2^61 to 2^62
2012-07-20	markr	NF-PM1	B1=10000000, B2=200000000, E=12
2010-05-26	Architects Cubed	NF	no factor from 2^60 to 2^61
2009-08-29	Carsten Kossendey	NF-PM1	B1=837797
2008-10-11	Sturle Sunde	NF	no factor from 2^59 to 2^60
2008-10-11	Sturle Sunde	NF	no factor from 2^58 to 2^59

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