746 843 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 2^89 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	7600000
B2 =	1203456454200

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	423 / 640

Estimated T-Level: 28.3 ⓘ

Status	Date	User	Residue	Shift
Verified		David Slowinski	2130	0
Verified		Ken Kriesel	236808297E486130	0
Verified	2002-10-19	S57483	236808297E486130	526337
Verified	2015-04-11	MadPoo	236808297E486130	74285

History

Date	User	Type	Result
2024-04-18	Joss	NF-PM1	B1=10000000, B2=14005661670
2023-05-03	masser	NF-PP1	Start=6/5, B1=7000000, B2=336000000
2023-04-08	masser	NF-PP1	Start=92/59, B1=7000000, B2=322000000
2023-04-08	masser	NF-PP1	Start=2/7, B1=7000000, B2=336000000
2022-05-07	lycorn	NF-PM1	B1=7600000, B2=1203456454200
2022-03-22	Gordon Spence	NF	no factor from 2^67 to 2^68
2020-05-15	Gordon Spence	NF	no factor from 2^66 to 2^67
2017-10-11	Smok_bmv	NF	no factor from 2^65 to 2^66
2016-04-08	lycorn	NF	no factor from 2^64 to 2^65
2015-11-23	Sid & Andy	NF-PM1	B1=7468430, B2=224052900, E=12
2015-10-20	Gordon Spence	NF	no factor from 2^63 to 2^64
2015-10-20	Gordon Spence	NF	no factor from 2^62 to 2^63
2015-04-11	MadPoo	C-LL	236808297E486130
2015-03-05	NR	NF	no factor from 2^61 to 2^62
2013-10-27	David Campeau	NF-PM1	B1=1520000, B2=51680000, E=12
2012-07-14	Joss	NF-PM1	B1=1493686
2011-10-22	Joss	NF-PM1	B1=970132
2011-08-15	Joss	NF-PM1	B1=485066
2011-06-19	Joss	NF-PM1	B1=400000
2010-06-11	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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