2 167 769 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 1 known prime factor. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
897895931283146200859809	24	79.6	2024-12-27 20:16:06

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	168 / 640

Estimated T-Level: 26.3 ⓘ

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

Status	Date	User	Residue	Shift
Verified (Factored)		Shaun Griffith	109231490FAF5841	0
Verified (Factored)	1999-02-07	Bryan Boggs	109231490FAF5841	581511
Verified (Factored)	2018-04-11	kkmrkkblmbrbk	109231490FAF5841	1164336

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2024-12-27	mikr	72CF3E78A50ACFC6	1	290797	5	3

History

Date	User	Type	Result
2024-12-28	Xyzzy	CERT	PRP Certification Proof certified good
2024-12-27	mikr	C-PRP	M2167769/897895931283146200859809 : 72CF3E78A50ACFC6 PRP proof power = 7 PRP: Verified Proof certified good
2024-12-27	mikr	F-ECM	Factor: 897895931283146200859809 / (ECM curve 21, B1=100000, B2=147138915, Edwards Sigma=7881974613559859)
2022-12-26	Architects Cubed	NF-PM1	B1=5000000, B2=9896994030
2021-07-15	TJAOI	NF	no factor from 2^68 to 2^69
2019-05-06	TJAOI	NF	no factor from 2^67 to 2^68
2018-04-11	kkmrkkblmbrbk	C-LL	109231490FAF5841
2018-01-13	mikr	NF-PM1	B1=2500000, B2=125000000, E=12
2017-09-05	Joss	NF-PM1	B1=448824, B2=4488240, E=6
2016-11-10	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-03-05	Joss	NF-PM1	B1=224412, B2=4039416, E=6
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2015-12-30	ramgeis	NF	no factor from 2^65 to 2^66
2015-03-25	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-25	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-10-05	Joss	NF-PM1	B1=149608
2013-01-23	dbaugh	NF	no factor from 2^62 to 2^63
2011-01-21	markr	NF-PM1	B1=120000, B2=2370000, E=6
2011-01-15	Joss	NF-PM1	B1=50000
2011-01-01	Joss	NF-PM1	B1=30000
2010-11-03	Joss	NF-PM1	B1=20000
2009-01-07	Sturle Sunde	NF	no factor from 2^61 to 2^62
2009-01-04	Sturle Sunde	NF	no factor from 2^60 to 2^61

Username
Password