898 013 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 2^87 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	35000000
B2 =	9992300037720

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	350 / 640

Estimated T-Level: 27.7 ⓘ

Status	Date	User	Residue	Shift
Verified		David Slowinski	23B3	0
Verified		tom ehlert	1E8853EDE85063B3	0
Verified	2002-02-03	Marc Getty / Phil Fizur	1E8853EDE85063B3	291276
Verified	2015-04-11	MadPoo	1E8853EDE85063B3	633190

History

Date	User	Type	Result
2024-01-07	Ethan O'Connor	NF-PM1	B1=35000000, B2=9992300037720
2023-11-06	Joss	NF-PM1	B1=4156109, B2=6940803870
2023-07-07	Joss	NF-PM1	B1=1852247, B2=20822591790
2023-03-11	masser	NF-PP1	Start=6/5, B1=5000000, B2=230000000
2023-03-10	masser	NF-PP1	Start=74/31, B1=5000000, B2=220000000
2023-03-09	masser	NF-PP1	Start=2/7, B1=5000000, B2=230000000
2023-03-08	Joss	NF-PM1	B1=1000000, B2=10002962970
2023-03-07	Joss	NF-PM1	B1=1000000, B2=3470356890
2023-01-12	Joss	NF-PM1	B1=1852247, B2=3470356890
2022-03-02	Gordon Spence	NF	no factor from 2^67 to 2^68
2019-02-11	lycorn	NF	no factor from 2^66 to 2^67
2018-05-11	BloodERazor	NF	no factor from 2^65 to 2^66
2016-01-17	lycorn	NF	no factor from 2^64 to 2^65
2015-10-11	Gordon Spence	NF	no factor from 2^63 to 2^64
2015-10-11	Gordon Spence	NF	no factor from 2^62 to 2^63
2015-04-28	Sid & Andy	NF-PM1	B1=8980130, B2=269403900, E=12
2015-04-11	MadPoo	C-LL	1E8853EDE85063B3
2014-06-05	lycorn	NF	no factor from 2^61 to 2^62
2013-10-11	David Campeau	NF-PM1	B1=990000, B2=25740000, E=12
2011-10-15	Joss	NF-PM1	B1=763895
2011-09-11	Joss	NF-PM1	B1=381947
2011-07-12	Joss	NF-PM1	B1=229168
2011-06-07	Joss	NF-PM1	B1=200000
2010-05-21	Architects Cubed	NF	no factor from 2^60 to 2^61
2008-10-12	Sturle Sunde	NF	no factor from 2^59 to 2^60
2008-10-12	Sturle Sunde	NF	no factor from 2^58 to 2^59

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