128 857 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

No factors below 2⁶⁸

TF target 2⁴⁴

TF below 2^114 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	10000000000
B2 =	1234861517029140

ECM

Estimated T-Level: 35.9 ⓘ

Status	Date	User	Residue	Shift
Verified		Unknown	2719	0
Verified		Reuven Singer	B016E66897D92719	0
Verified		Brian J. Beesley	B016E66897D92719	0
Verified		Eivind Triel	B016E66897D92719	90018
Verified	2016-06-01	MadPoo	B016E66897D92719	12634

History

Date	User	Type	Result
2023-09-11	Oliver Kruse	NF-PM1	B1=10000000000, B2=1234861517029140
2023-05-04	masser	NF-PP1	Start=6/5, B1=50000000, B2=3050000000
2023-04-27	masser	NF-PP1	Start=128/71, B1=50000000, B2=2550000000
2023-04-22	masser	NF-PP1	Start=2/7, B1=50000000, B2=4050000000
2023-02-17	Joss	NF-PM1	B1=1000000, B2=522803591310
2023-01-17	Joss	NF-PM1	B1=1000000, B2=173706132600
2022-05-09	404_factor_not_found	NF	no factor from 2^67 to 2^68
2022-03-07	LordJulius	NF	no factor from 2^54 to 2^55
2020-02-12	Gordon Spence	NF	no factor from 2^66 to 2^67
2019-07-15	Yxinity	NF	no factor from 2^65 to 2^66
2018-05-14	chuenkit	NF	no factor from 2^64 to 2^65
2016-06-01	MadPoo	C-LL	B016E66897D92719
2016-02-28	Gordon Spence	NF	no factor from 2^63 to 2^64
2016-02-28	Gordon Spence	NF	no factor from 2^62 to 2^63
2016-02-23	Mark Rose	NF	no factor from 2^57 to 2^58
2015-08-14	NR	NF	no factor from 2^61 to 2^62
2012-12-01	Richard B. Woods	NF	no factor from 2^60 to 2^61
2011-02-21	Bud	NF-PM1	B1=100000000, B2=2000000000, E=12
2009-02-07	Sturle Sunde	NF	no factor from 2^59 to 2^60
2008-12-31	Sturle Sunde	NF	no factor from 2^58 to 2^59

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