225 629 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 2^106 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	134000000
B2 =	5523563515470

ECM

Estimated T-Level: 33.4 ⓘ

Status	Date	User	Residue	Shift
Verified		Unknown	4769	0
Verified		George Johnston	8313FC835DB9C769	0
Verified		Brian J. Beesley	8313FC835DB9C769	0
Verified		Eivind Triel	8313FC835DB9C769	130870
Verified	2016-06-01	MadPoo	8313FC835DB9C769	212402

Assigned

Assigned	User	Work Type	Updated
2025-09-05	-Anonymous-	factor ECM small	2025-09-05
2025-09-02	-Anonymous-	factor ECM small	2025-09-02
2025-08-22	-Anonymous-	factor ECM small	2025-08-22

History

Date	User	Type	Result
2023-09-03	masser	NF-PP1	Start=116/47, B1=30000000, B2=2370000000
2023-09-02	masser	NF-PP1	Start=6/5, B1=30000000, B2=2370000000
2023-02-11	masser	NF-PP1	Start=137/61, B1=30000000, B2=960000000
2023-02-05	masser	NF-PP1	Start=2/7, B1=30000000, B2=990000000
2022-06-11	Sid & Andy	NF-PM1	B1=134000000, B2=5523563515470
2022-03-07	LordJulius	NF	no factor from 2^54 to 2^55
2019-12-20	Gordon Spence	NF	no factor from 2^65 to 2^66
2018-03-04	Gordon Spence	NF	no factor from 2^64 to 2^65
2016-07-12	Joss	NF-PM1	B1=39275280, B2=785505600, E=12
2016-06-01	MadPoo	C-LL	8313FC835DB9C769
2016-02-23	Mark Rose	NF	no factor from 2^57 to 2^58
2016-02-04	Gordon Spence	NF	no factor from 2^63 to 2^64
2016-02-04	Gordon Spence	NF	no factor from 2^62 to 2^63
2016-01-25	Joss	NF-PM1	B1=39275280, B2=392752800, E=12
2015-07-07	snme2pm1	NF	no factor from 2^61 to 2^62
2013-10-10	David Campeau	NF-PM1	B1=3110000, B2=82650000, E=12
2013-07-25	lycorn	NF	no factor from 2^60 to 2^61
2012-02-17	Joss	NF-PM1	B1=2862385
2011-07-19	Joss	NF-PM1	B1=2289908
2009-01-26	Sturle Sunde	NF	no factor from 2^59 to 2^60
2009-01-01	Sturle Sunde	NF	no factor from 2^58 to 2^59

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