1 704 943 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Composite: proven not-prime with both PRP and Lucas-Lehmer tests

No factors below 2⁶⁸

TF target 2⁶¹

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

P-1

B1 =	17000000
B2 =	280483863660

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	105 / 640

Estimated T-Level: 25.8 ⓘ

Status	Date	User	Residue	Shift
Verified		David Linton	0659B833976492B7	0
Verified	1999-01-02	MIT dept. of Univ. of Jyvaskyla	0659B833976492B7	1020623
Verified	2015-07-01	MadPoo	0659B833976492B7	1032491

Status	Date	User	Residue	Shift	Type	Base
Verified	2025-09-02	Kriesel	08F2BA81CF9A42EA	0	1	3

History

Date	User	Type	Result
2025-09-03	Carlos Pinho	CERT	PRP Certification CERT proof power = 6 Proof certified good
2025-09-02	Kriesel	C-PRP	08F2BA81CF9A42EA PRP proof power = 6 PRP: Verified Proof certified good
2023-06-12	linament	NF-PM1	B1=17000000, B2=280483863660
2023-06-12	linament	NF-PM1	B1=17000000
2023-03-13	Joss	NF-PM1	B1=10000000, B2=3535459200
2023-01-03	Joss	NF-PM1	B1=10000000, B2=1277374560
2021-05-04	Carlos Pinho	NF-PP1	Start=2/7, B1=1000000, B2=51000000
2019-07-24	TJAOI	NF	no factor from 2^67 to 2^68
2018-06-18	TJAOI	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
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
2015-08-30	ramgeis	NF	no factor from 2^65 to 2^66
2015-07-01	MadPoo	C-LL	0659B833976492B7
2015-02-18	VictordeHollander	NF-PM1	B1=10000000, B2=200000000, E=12
2015-02-13	Joss	NF-PM1	B1=374633
2015-02-13	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-02-13	VictordeHollander	NF	no factor from 2^63 to 2^64
2015-01-07	Joss	NF-PM1	B1=281469
2014-10-03	Joss	NF-PM1	B1=187646
2014-04-28	Joss	NF-PM1	B1=150000
2014-03-31	Joss	NF-PM1	B1=100000
2011-02-07	Carsten Kossendey	NF-PM1	B1=90000, B2=1507500, E=6
2011-01-29	Joss	NF-PM1	B1=50000
2010-10-16	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2010-04-24	Architects Cubed	NF	no factor from 2^60 to 2^61

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