393 541 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
4166405001784478339849	22	71.8	2009-09-05 17:36:49

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	200 / 640

Estimated T-Level: 26.6 ⓘ

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

Status	Date	User	Residue	Shift
Verified (Factored)		John Sweeney	0DA	0
Verified (Factored)		David Slowinski	10DA	0
Verified (Factored)		Matt Horbal	20F044748F5D90DA	0
Verified (Factored)		Jeffrey Wolfe	20F044748F5D90DA	0
Verified (Factored)		Eivind Triel	20F044748F5D90DA	169644

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-23	Oliver Kruse	6A9B5AB3547F7266	1	0	1	3
Verified	2017-11-02	kkmrkkblmbrbk	6A9B5AB3547F7266	1	109106	1	3
Unverified (Reliable)	2020-04-18	Oliver Kruse	FC5D536C612170__	1	129998	5	3

History

Date	User	Type	Result
2024-02-19	Denial140	NF-PM1	B1=1000000, B2=6154694700
2022-03-07	LordJulius	NF	no factor from 2^54 to 2^55
2020-04-18	Oliver Kruse	C-PRP	M393541/4166405001784478339849 : FC5D536C612170__ PRP: Unverified (Reliable) PRP without proof (small exponent)
2017-11-02	kkmrkkblmbrbk	C-PRP	M393541/4166405001784478339849 : 6A9B5AB3547F7266 PRP: Unverified (Reliable) PRP without proof (small exponent)
2017-09-23	Oliver Kruse	C-PRP	M393541/4166405001784478339849 : 6A9B5AB3547F7266 PRP: Unverified (Reliable) PRP without proof (not generated)
2009-09-05	JimBa	F-ECM	Factor: 4166405001784478339849
2009-01-04	Sturle Sunde	NF	no factor from 2^59 to 2^60
2008-12-29	Sturle Sunde	NF	no factor from 2^58 to 2^59