195 229 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 2^110 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	510000000
B2 =	210202576734150

ECM

Estimated T-Level: 34.6 ⓘ

Status	Date	User	Residue	Shift
Verified		Amdahl 6 - 1989	0683DB1F	0
Verified		Martin Eibl	59334B7C8683DB1F	0
Verified		Brian J. Beesley	59334B7C8683DB1F	0
Verified		Eivind Triel	59334B7C8683DB1F	186219
Verified	2016-06-01	MadPoo	59334B7C8683DB1F	4889

History

Date	User	Type	Result
2025-01-03	Bommer	NF-PM1	B1=510000000, B2=210202576734150
2024-11-11	yuriy5-1	NF-PM1	B1=500000000, B2=180654587723610
2023-04-15	JacobZ	NF-PM1	B1=136905069, B2=8238649088670
2023-02-25	masser	NF-PP1	Start=6/5, B1=30000000, B2=840000000
2023-02-11	masser	NF-PP1	Start=88/13, B1=30000000, B2=960000000
2023-02-09	masser	NF-PP1	Start=2/7, B1=30000000, B2=990000000
2023-01-24	Joss	NF-PM1	B1=1000000, B2=74759955270
2022-03-07	LordJulius	NF	no factor from 2^54 to 2^55
2019-12-12	Gordon Spence	NF	no factor from 2^65 to 2^66
2018-01-04	BloodERazor	NF	no factor from 2^64 to 2^65
2016-06-01	MadPoo	C-LL	59334B7C8683DB1F
2016-02-23	Mark Rose	NF	no factor from 2^57 to 2^58
2016-01-10	Gordon Spence	NF	no factor from 2^63 to 2^64
2016-01-10	Gordon Spence	NF	no factor from 2^62 to 2^63
2015-08-25	NR	NF	no factor from 2^61 to 2^62
2013-10-27	Sid & Andy	NF	no factor from 2^60 to 2^61
2013-10-07	alpertron	NF-PM1	B1=100000000, B2=2000000000, E=12
2009-02-03	axn	NF-PM1	B1=5000000, B2=200000000, E=12
2009-01-24	Sturle Sunde	NF	no factor from 2^59 to 2^60
2008-12-30	Sturle Sunde	NF	no factor from 2^58 to 2^59

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