1 194 889 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

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

No factors below 2⁶⁹

TF target 2⁶⁰

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

P-1

B1 =	15000000
B2 =	53177562900

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	100 / 640

Estimated T-Level: 25.8 ⓘ

Status	Date	User	Residue	Shift
Verified		Joel Smith	0BE7342F5CBD5D27	0
Verified		Cornelius Caesar	0BE7342F5CBD5D27	0
Verified		Ricardo Montiel	0BE7342F5CBD5D27	0
Verified	2015-11-12	MadPoo	0BE7342F5CBD5D27	410416

Status	Date	User	Residue	Shift	Type	Base
Verified	2020-11-05	Ethan O'Connor	C33D29F741B57D06	516051	1	3
Verified	2025-09-01	Kriesel	C33D29F741B57D06	0	1	3

History

Date	User	Type	Result
2025-09-02	Michael Bahlen	CERT	PRP Certification CERT proof power = 6 Proof certified good
2025-09-01	Kriesel	C-PRP	C33D29F741B57D06 PRP proof power = 6 PRP: Verified Proof certified good
2023-10-31	mikr	NF-PM1	B1=15000000, B2=53177562900
2023-07-27	Joss	NF-PM1	B1=1194889, B2=26580243690
2022-11-13	Joss	NF-PM1	B1=1194889, B2=12482419950
2022-01-06	Gordon Spence	NF	no factor from 2^68 to 2^69
2020-11-06	ANONYMOUS	CERT	PRP Certification CERT proof power = 6 Proof certified good
2020-11-05	Ethan O'Connor	C-PRP	C33D29F741B57D06 PRP proof power = 6 PRP: Verified Proof certified good
2020-03-10	Gordon Spence	NF	no factor from 2^67 to 2^68
2018-10-12	Joss	NF-PM1	B1=1194889, B2=131437790, E=12
2018-09-11	Yxinity	NF	no factor from 2^66 to 2^67
2018-04-25	Joss	NF-PM1	B1=1194889, B2=119488900, E=12
2016-08-27	Bruno Victal	NF-PM1	B1=2500000, B2=62500000, E=12
2016-07-30	Bruno Victal	NF-PM1	B1=2500000, B2=62500000, E=12
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2015-11-12	MadPoo	C-LL	0BE7342F5CBD5D27
2015-10-01	ramgeis	NF	no factor from 2^65 to 2^66
2015-04-04	monst	NF	no factor from 2^64 to 2^65
2015-03-24	omylist	NF	no factor from 2^63 to 2^64
2013-11-07	David Campeau	NF-PM1	B1=1210000, B2=35090000, E=12
2012-11-24	dbaugh	NF	no factor from 2^62 to 2^63
2012-09-13	Axelsson	NF	no factor from 2^61 to 2^62
2009-02-16	Sturle Sunde	NF	no factor from 2^60 to 2^61

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