1 057 541 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

1057541

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

No factors below 2⁷¹

TF target 2⁶⁰

TF below 2^84 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	24000000
B2 =	80299695630

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	243 / 640

Estimated T-Level: 26.9 ⓘ

Status	Date	User	Residue	Shift
Verified		David Slowinski	BAD	0
Verified		Phil Nesser	D7C4DD610FE80BAD	0
Verified	2002-02-24	S57483	D7C4DD610FE80BAD	981365
Verified	2016-06-01	MadPoo	D7C4DD610FE80BAD	437748

PRP

Status	Date	User	Residue	Shift	Type	Base
Verified	2020-11-02	Ethan O'Connor	4CB3DA4A6E84AE79	0	1	3
Verified	2025-09-01	Kriesel	4CB3DA4A6E84AE79	0	1	3

History

Date	User	Type	Result
2025-09-02	LookAS	CERT	PRP Certification CERT proof power = 6 Proof certified good
2025-09-01	Kriesel	C-PRP	4CB3DA4A6E84AE79 PRP proof power = 6 PRP: Verified Proof certified good
2022-04-30	axn	NF-PM1	B1=24000000, B2=80299695630
2022-02-28	Numberwang	NF-PM1	B1=114000, B2=2623691070
2020-11-02	Ben Delo	CERT	PRP Certification CERT proof power = 8 Proof certified good
2020-11-02	Ethan O'Connor	C-PRP	4CB3DA4A6E84AE79 PRP proof power = 8 PRP: Verified Proof certified good
2018-11-13	Joss	NF-PM1	B1=1102208, B2=126904920, E=12
2018-04-04	Joss	NF-PM1	B1=1102208, B2=110220800, E=12
2016-06-01	MadPoo	C-LL	D7C4DD610FE80BAD
2016-05-20	Bruno Victal	NF-PM1	B1=2500000, B2=62500000, E=12
2016-03-29	Joss	NF-PM1	B1=1082208
2016-03-23	Joss	NF-PM1	B1=901840
2016-02-23	Mark Rose	NF	no factor from 2^57 to 2^60
2015-10-16	Bruno Victal	NF-PM1	B1=500000, B2=15000000, E=12
2014-10-19	Joss	NF-PM1	B1=321382
2014-08-07	Joss	NF-PM1	B1=260691
2014-04-01	Never Odd Or Even	NF	no factor from 2^70 to 2^71
2014-01-12	Never Odd Or Even	NF	no factor from 2^69 to 2^70
2014-01-12	Never Odd Or Even	NF	no factor from 2^68 to 2^69
2013-04-19	Never Odd Or Even	NF	no factor from 2^67 to 2^68
2013-04-19	Never Odd Or Even	NF	no factor from 2^66 to 2^67
2013-04-19	Never Odd Or Even	NF	no factor from 2^65 to 2^66
2013-04-19	Never Odd Or Even	NF	no factor from 2^64 to 2^65
2013-04-19	Never Odd Or Even	NF	no factor from 2^63 to 2^64
2012-10-07	dbaugh	NF	no factor from 2^62 to 2^63
2012-01-04	bcp19	NF-PM1	B1=200000, B2=10000000, E=12
2010-11-12	Michael C	NF	no factor from 2^61 to 2^62
2009-02-15	Sturle Sunde	NF	no factor from 2^60 to 2^61

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