1 709 963 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

1709963

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 =	272007836100

ECM

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

Estimated T-Level: 25.8 ⓘ

Status	Date	User	Residue	Shift
Verified		Michael J. Kilfoyle	58C799375D03F8D8	0
Verified	1999-03-15	Lars Lindley	58C799375D03F8D8	65959
Verified	2015-07-19	MadPoo	58C799375D03F8D8	158059

PRP

Status	Date	User	Residue	Shift	Type	Base
Verified	2025-09-02	Kriesel	7D9910C2DE0C7914	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	7D9910C2DE0C7914 PRP proof power = 6 PRP: Verified Proof certified good
2023-06-16	linament	NF-PM1	B1=17000000, B2=272007836100
2023-06-15	linament	NF-PM1	B1=17000000
2023-03-19	Joss	NF-PM1	B1=1709963, B2=3510457860
2022-12-19	Joss	NF-PM1	B1=1709963, B2=1252357260
2021-05-05	Carlos Pinho	NF-PP1	Start=2/7, B1=1000000, B2=51000000
2019-06-24	TJAOI	NF	no factor from 2^67 to 2^68
2018-10-16	Joss	NF-PM1	B1=1709963, B2=188095930, E=12
2018-06-18	Joss	NF-PM1	B1=1709963, B2=170996300, E=12
2018-06-11	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
2015-09-01	ramgeis	NF	no factor from 2^65 to 2^66
2015-07-29	mikr	NF-PM1	B1=3642200, B2=123456789, E=12
2015-07-21	Joss	NF-PM1	B1=1564002
2015-07-19	MadPoo	C-LL	58C799375D03F8D8
2015-07-13	Joss	NF-PM1	B1=1421820
2015-07-07	Joss	NF-PM1	B1=1292564
2015-06-25	Joss	NF-PM1	B1=1175059
2015-06-08	Joss	NF-PM1	B1=1068236
2015-05-26	Joss	NF-PM1	B1=971124
2015-05-22	Joss	NF-PM1	B1=882840
2015-05-07	Joss	NF-PM1	B1=802582
2015-05-01	Joss	NF-PM1	B1=729620
2015-04-28	snme2pm1	NF	no factor from 2^64 to 2^65
2015-04-28	snme2pm1	NF	no factor from 2^63 to 2^64
2015-04-08	Joss	NF-PM1	B1=602992
2015-03-14	Joss	NF-PM1	B1=498341
2015-03-05	Joss	NF-PM1	B1=453038
2015-02-23	Joss	NF-PM1	B1=411853
2015-02-16	Joss	NF-PM1	B1=374412
2015-02-03	Joss	NF-PM1	B1=309432
2015-01-09	Joss	NF-PM1	B1=281302
2014-10-05	Joss	NF-PM1	B1=187535
2014-04-29	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
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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