1 034 251 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

1034251

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

No factors below 2⁷¹

TF target 2⁶⁰

TF below 2^83 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	28000000
B2 =	85350951840

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	182 / 640

Estimated T-Level: 26.4 ⓘ

Status	Date	User	Residue	Shift
Verified		Gerardo Cisneros	1A3	0
Verified		Colin Plumb	A0E0D692545CE1A3	0
Verified	2002-02-10	S57483	A0E0D692545CE1A3	68436
Verified	2016-06-01	MadPoo	A0E0D692545CE1A3	559261

PRP

Status	Date	User	Residue	Shift	Type	Base
Verified	2020-11-01	Ethan O'Connor	040AB17E3A19CB12	0	1	3
Verified	2025-09-01	Kriesel	040AB17E3A19CB12	0	1	3

Assigned

Assigned	User	Work Type	Stage	% Done	Updated	Expired
2025-09-07	-Anonymous-	factor ECM small		0.00 %	2025-09-11

History

Date	User	Type	Result
2025-09-17	Joss	NF-PP1	Start=2/7, B1=1000000
2025-09-01	Massimo Cappelli (ik5pwa)	CERT	PRP Certification CERT proof power = 6 Proof certified good
2025-09-01	Kriesel	C-PRP	040AB17E3A19CB12 PRP proof power = 6 PRP: Verified Proof certified good
2022-05-20	axn	NF-PM1	B1=28000000, B2=85350951840
2021-01-11	GdS	NF-PM1	B1=6340811, B2=317040560, E=12
2020-11-01	Franklin Webber	CERT	PRP Certification CERT proof power = 8 Proof certified good
2020-11-01	Ethan O'Connor	C-PRP	040AB17E3A19CB12 PRP proof power = 8 PRP: Verified Proof certified good
2018-11-19	Joss	NF-PM1	B1=1220550, B2=207884451
2018-10-21	Joss	NF-PM1	B1=1220550, B2=206850200, E=12
2018-03-25	Joss	NF-PM1	B1=1220550, B2=122055000, E=12
2016-06-01	MadPoo	C-LL	A0E0D692545CE1A3
2016-05-17	Bruno Victal	NF-PM1	B1=2500000, B2=62500000, E=12
2016-03-28	Joss	NF-PM1	B1=1200550
2016-03-23	Joss	NF-PM1	B1=1000459
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2015-10-16	Bruno Victal	NF-PM1	B1=500000, B2=15000000, E=12
2014-10-18	Joss	NF-PM1	B1=324116
2014-07-18	Joss	NF-PM1	B1=262058
2014-04-01	Never Odd Or Even	NF	no factor from 2^70 to 2^71
2013-06-09	Never Odd Or Even	NF	no factor from 2^69 to 2^70
2013-06-09	Never Odd Or Even	NF	no factor from 2^68 to 2^69
2013-04-03	Never Odd Or Even	NF	no factor from 2^67 to 2^68
2013-04-03	Never Odd Or Even	NF	no factor from 2^66 to 2^67
2013-04-03	Never Odd Or Even	NF	no factor from 2^65 to 2^66
2013-04-03	Never Odd Or Even	NF	no factor from 2^64 to 2^65
2012-12-30	dbaugh	NF	no factor from 2^63 to 2^64
2012-03-06	bcp19	NF-PM1	B1=200000, B2=100000000, E=12
2011-12-30	bcp19	NF-PM1	B1=200000, B2=10000000, E=12
2010-12-04	Michael C	NF	no factor from 2^62 to 2^63
2010-11-08	Michael C	NF	no factor from 2^61 to 2^62
2009-02-26	Sturle Sunde	NF	no factor from 2^60 to 2^61

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