41 659 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Composite: proven not-prime with Lucas-Lehmer test

No factors below 2⁶⁶

TF target 2⁴⁴

TF below 2^148 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	17300000000
B2 =	5669690174898750

ECM

Estimated T-Level: 46.0 ⓘ

Status	Date	User	Residue	Shift
Verified		Unknown	2ACB	0
Verified		George Woltman	F7C6CFE4EC04AACB	0
Verified		Brian J. Beesley	F7C6CFE4EC04AACB	0
Verified	2015-04-11	MadPoo	F7C6CFE4EC04AACB	36901

History

Date	User	Type	Result
2024-02-23	One Man	NF-PM1	B1=17300000000, B2=5669690174898750
2023-08-09	masser	NF-PP1	Start=82/41, B1=170000000, B2=30430000000
2022-09-25	masser	NF-PP1	Start=2/7, B1=10000000, B2=480000000
2022-09-25	masser	NF-PP1	Start=6/5, B1=5000000, B2=205000000
2022-09-25	masser	NF-PP1	Start=100/13, B1=10000000, B2=460000000
2022-05-21	ATH	NF-PM1	B1=5000000000, B2=500286198992580
2021-05-30	Ruslan Borisov	NF	no factor from 2^65 to 2^66
2019-10-04	Yxinity	NF	no factor from 2^64 to 2^65
2019-10-03	Yxinity	NF	no factor from 2^64 to 2^65
2019-03-21	alex	NF-PM1	B1=1000000000, B2=50000000000, E=12
2018-07-30	Yxinity	NF	no factor from 2^63 to 2^64
2018-07-28	Yxinity	NF	no factor from 2^63 to 2^64
2016-10-11	Sid & Andy	NF	no factor from 2^62 to 2^63
2016-05-09	Joss	NF-PM1	B1=200000000, B2=3600000000, E=12
2016-02-23	LaurV	NF	no factor from 2^57 to 2^58
2015-04-11	MadPoo	C-LL	F7C6CFE4EC04AACB
2014-07-04	Sid & Andy	NF	no factor from 2^61 to 2^62
2013-11-27	LaurV	NF	no factor from 2^60 to 2^61
2012-06-16	alpertron	NF-PM1	B1=100000000, B2=2000000000, E=12
2012-05-29	Joss	NF-PM1	B1=61409670
2009-02-01	Sturle Sunde	NF	no factor from 2^59 to 2^60
2009-01-07	Sturle Sunde	NF	no factor from 2^58 to 2^59

Username
Password