1 935 221 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

No factors below 2⁶⁸

TF target 2⁶²

TF below 2^81 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	18000000
B2 =	57715137480

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	106 / 640

Estimated T-Level: 25.8 ⓘ

Status	Date	User	Residue	Shift
Verified		Michael Bertrand	EE5DA0281C648585	0
Verified	1999-03-01	Michael Croon	EE5DA0281C648585	123687
Verified	2015-07-01	MadPoo	EE5DA0281C648585	1903634

History

Date	User	Type	Result
2023-10-09	Sid & Andy	NF-PM1	B1=18000000, B2=57715137480
2023-06-22	Joss	NF-PM1	B1=1936221, B2=5395249860
2023-01-10	Joss	NF-PM1	B1=1936221, B2=1890473970
2022-08-14	masser	NF-PP1	Start=2/7, B1=1500000, B2=54000000
2019-05-10	chuenkit	NF	no factor from 2^67 to 2^68
2018-01-31	mikr	NF-PM1	B1=8000000, B2=320000000, E=12
2018-01-15	TJAOI	NF	no factor from 2^66 to 2^67
2018-01-04	Joss	NF-PM1	B1=1935221, B2=30963536, E=12
2018-01-03	Joss	NF-PM1	B1=1935221, B2=7740884, E=6
2018-01-03	Joss	NF-PM1	B1=1935221, B2=3870442, E=6
2016-02-23	Mark Rose	NF	no factor from 2^61 to 2^62
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2015-09-04	ramgeis	NF	no factor from 2^65 to 2^66
2015-07-01	MadPoo	C-LL	EE5DA0281C648585
2015-05-14	lycorn	NF	no factor from 2^64 to 2^65
2015-05-14	lycorn	NF	no factor from 2^63 to 2^64
2011-11-20	kurly	NF-PM1	B1=1000000, B2=30000000, E=12
2011-08-27	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2010-02-02	S485122	NF	no factor from 2^60 to 2^61

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