1 707 707 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

1707707

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

No factors below 2⁷¹

TF target 2⁶¹

TF below 2^82 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	17000000
B2 =	239957778060

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	141 / 640

Estimated T-Level: 26.1 ⓘ

Status	Date	User	Residue	Shift
Verified		Bruce Appleby	9064E9E70188B8EC	0
Verified	1998-12-13	Paul Victor Novarese	9064E9E70188B8EC	1343343
Verified	2015-07-19	MadPoo	9064E9E70188B8EC	1565699

PRP

Status	Date	User	Residue	Shift	Type	Base
Verified	2025-09-02	Kriesel	EB469FF72471F0D2	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	EB469FF72471F0D2 PRP proof power = 6 PRP: Verified Proof certified good
2023-06-13	linament	NF-PM1	B1=17000000, B2=239957778060
2023-06-12	linament	NF-PM1	B1=17000000
2023-03-15	Joss	NF-PM1	B1=1707707, B2=3510198510
2023-01-03	Joss	NF-PM1	B1=1707707, B2=1252093920
2021-05-05	Carlos Pinho	NF-PP1	Start=2/7, B1=1000000, B2=51000000
2018-10-16	Joss	NF-PM1	B1=1707707, B2=187847770, E=12
2018-04-06	Joss	NF-PM1	B1=1707707, B2=170770700, E=12
2018-02-27	Joss	NF-PM1	B1=1707707, B2=110000000, E=12
2018-02-11	Joss	NF-PM1	B1=1707707, B2=55000000, E=12
2018-02-10	Joss	NF-PM1	B1=1707707, B2=27500000, E=12
2018-02-04	Joss	NF-PM1	B1=1500000
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
2015-10-30	ramgeis	NF	no factor from 2^70 to 2^71
2015-07-19	MadPoo	C-LL	9064E9E70188B8EC
2014-05-01	Aaron Haviland	NF-PM1	B1=1500000, B2=27500000, e=12
2014-04-29	Joss	NF-PM1	B1=150000
2014-03-31	Joss	NF-PM1	B1=100000
2014-01-18	Never Odd Or Even	NF	no factor from 2^69 to 2^70
2014-01-18	Never Odd Or Even	NF	no factor from 2^68 to 2^69
2014-01-18	Never Odd Or Even	NF	no factor from 2^67 to 2^68
2014-01-18	Never Odd Or Even	NF	no factor from 2^66 to 2^67
2014-01-18	Never Odd Or Even	NF	no factor from 2^65 to 2^66
2011-05-07	megavink	NF	no factor from 2^64 to 2^65
2011-05-07	megavink	NF	no factor from 2^63 to 2^64
2011-02-08	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
2010-04-22	Architects Cubed	NF	no factor from 2^60 to 2^61

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