1 088 267 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

1088267

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

No factors below 2⁷¹

TF target 2⁶⁰

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

P-1

B1 =	27000000
B2 =	69046782420

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	99 / 640

Estimated T-Level: 25.8 ⓘ

Status	Date	User	Residue	Shift
Verified		John Guin	89C0E9533D5B8719	0
Verified		Cornelius Caesar	89C0E9533D5B8719	0
Verified	2004-01-27	Brian J. Beesley	89C0E9533D5B8719	141970
Verified	2016-06-01	MadPoo	89C0E9533D5B8719	88724

PRP

Status	Date	User	Residue	Shift	Type	Base
Verified	2025-08-02	kkmrkkblmbrbk	4BC3DA0B17B726B5	965910	1	3
Verified	2025-09-01	Kriesel	4BC3DA0B17B726B5	0	1	3

History

Date	User	Type	Result
2025-09-01	Architects Cubed	CERT	PRP Certification CERT proof power = 6 Proof certified good
2025-09-01	Kriesel	C-PRP	4BC3DA0B17B726B5 PRP proof power = 6 PRP: Verified Proof certified good
2025-08-02	ANONYMOUS	CERT	PRP Certification CERT proof power = 6 Proof certified good
2025-08-02	kkmrkkblmbrbk	C-PRP	4BC3DA0B17B726B5 PRP proof power = 6 PRP: Verified Proof certified good
2022-04-04	axn	NF-PM1	B1=27000000, B2=69046782420
2018-11-19	Joss	NF-PM1	B1=2727953, B2=218741667
2018-11-16	Joss	NF-PM1	B1=2727953, B2=217653400, E=12
2018-02-01	Joss	NF-PM1	B1=2727953, B2=200000000, E=12
2018-01-01	Joss	NF-PM1	B1=2727953, B2=10911812, E=6
2017-12-31	Joss	NF-PM1	B1=2727953, B2=5455906, E=6
2016-11-09	Joss	NF-PM1	B1=2707953
2016-11-08	Joss	NF-PM1	B1=2256628
2016-11-06	Joss	NF-PM1	B1=1880524
2016-11-04	Joss	NF-PM1	B1=1567104
2016-11-04	Joss	NF-PM1	B1=1305920
2016-08-04	Joss	NF-PM1	B1=1088267, B2=200000000, E=12
2016-07-27	Bruno Victal	NF-PM1	B1=2500000, B2=62500000, E=12
2016-07-22	Bruno Victal	NF-PM1	B1=2500000, B2=62500000, E=12
2016-06-01	MadPoo	C-LL	89C0E9533D5B8719
2016-05-23	Joss	NF-PM1	B1=1088267
2016-02-23	Mark Rose	NF	no factor from 2^57 to 2^60
2014-11-06	Joss	NF-PM1	B1=317956
2014-08-21	Joss	NF-PM1	B1=258978
2014-04-01	Never Odd Or Even	NF	no factor from 2^70 to 2^71
2013-11-20	Never Odd Or Even	NF	no factor from 2^69 to 2^70
2013-11-20	Never Odd Or Even	NF	no factor from 2^68 to 2^69
2013-10-24	Never Odd Or Even	NF	no factor from 2^67 to 2^68
2013-10-24	Never Odd Or Even	NF	no factor from 2^66 to 2^67
2013-10-24	Never Odd Or Even	NF	no factor from 2^65 to 2^66
2013-10-07	David Campeau	NF	no factor from 2^64 to 2^65
2013-05-05	Never Odd Or Even	NF	no factor from 2^63 to 2^64
2012-12-30	dbaugh	NF	no factor from 2^62 to 2^63
2012-02-05	bcp19	NF-PM1	B1=200000, B2=100000000, E=12
2012-01-01	bcp19	NF-PM1	B1=200000, B2=10000000, E=12
2010-11-17	Michael C	NF	no factor from 2^61 to 2^62
2009-02-17	Sturle Sunde	NF	no factor from 2^60 to 2^61

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